SELECT 
  jmj_bm_snapping.grid_id as grid_id, 
  jmj_bm_snapping.block_id as block_id, 
  IFNULL(
    dynamic_object_content.content, 
    default_content.content
  ) as content, 
  IFNULL(
    dynamic_object_content.object_id, 
    default_content.object_id
  ) AS object_id, 
  IFNULL(
    dynamic_object_content.object_type, 
    default_content.object_type
  ) AS object_type, 
  jmj_bm_block_statuses.object_ids as object_ids, 
  jmj_bm_snapping.*, 
  jmj_bm_blocks.*, 
  jmj_bm_blocks_descriptions.* 
FROM 
  jmj_bm_snapping 
  LEFT JOIN jmj_bm_blocks ON jmj_bm_blocks.block_id = jmj_bm_snapping.block_id 
  LEFT JOIN jmj_bm_block_statuses ON jmj_bm_snapping.snapping_id = jmj_bm_block_statuses.snapping_id 
  AND jmj_bm_block_statuses.object_type LIKE '' 
  LEFT JOIN jmj_bm_blocks_descriptions ON jmj_bm_blocks.block_id = jmj_bm_blocks_descriptions.block_id 
  LEFT JOIN jmj_bm_blocks_content AS default_content ON jmj_bm_blocks.block_id = default_content.block_id 
  AND jmj_bm_blocks_descriptions.lang_code = default_content.lang_code 
  AND default_content.snapping_id = 0 
  AND default_content.object_id = 0 
  AND default_content.object_type like '' 
  LEFT JOIN jmj_bm_blocks_content AS dynamic_object_content ON jmj_bm_blocks.block_id = dynamic_object_content.block_id 
  AND jmj_bm_blocks_descriptions.lang_code = dynamic_object_content.lang_code 
  AND dynamic_object_content.object_id = 0 
  AND dynamic_object_content.object_type like '' 
WHERE 
  jmj_bm_snapping.grid_id IN (
    6192, 6193, 6194, 6195, 6197, 6196, 6198, 
    6201, 6202, 6207, 6847, 6206, 6204, 
    6208, 6203, 6205, 6846, 6273, 6274, 
    6275, 6276
  ) 
  AND jmj_bm_blocks_descriptions.lang_code = 'en' 
ORDER BY 
  jmj_bm_snapping.order, 
  jmj_bm_snapping.block_id

Query time 0.01646

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "1342.76"
    },
    "ordering_operation": {
      "using_filesort": true,
      "cost_info": {
        "sort_cost": "464.00"
      },
      "nested_loop": [
        {
          "table": {
            "table_name": "jmj_bm_snapping",
            "access_type": "range",
            "possible_keys": [
              "grid_id"
            ],
            "key": "grid_id",
            "used_key_parts": [
              "grid_id"
            ],
            "key_length": "4",
            "rows_examined_per_scan": 29,
            "rows_produced_per_join": 29,
            "filtered": "100.00",
            "index_condition": "(`jmj_test`.`jmj_bm_snapping`.`grid_id` in (6192,6193,6194,6195,6197,6196,6198,6201,6202,6207,6847,6206,6204,6208,6203,6205,6846,6273,6274,6275,6276))",
            "cost_info": {
              "read_cost": "55.81",
              "eval_cost": "5.80",
              "prefix_cost": "61.61",
              "data_read_per_join": "22K"
            },
            "used_columns": [
              "snapping_id",
              "block_id",
              "grid_id",
              "wrapper",
              "user_class",
              "order",
              "status"
            ]
          }
        },
        {
          "table": {
            "table_name": "jmj_bm_block_statuses",
            "access_type": "ref",
            "possible_keys": [
              "snapping_id"
            ],
            "key": "snapping_id",
            "used_key_parts": [
              "snapping_id"
            ],
            "key_length": "4",
            "ref": [
              "jmj_test.jmj_bm_snapping.snapping_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 29,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "29.00",
              "eval_cost": "5.80",
              "prefix_cost": "96.41",
              "data_read_per_join": "3K"
            },
            "used_columns": [
              "snapping_id",
              "object_ids",
              "object_type"
            ],
            "attached_condition": "<if>(is_not_null_compl(jmj_bm_block_statuses), ((`jmj_test`.`jmj_bm_snapping`.`snapping_id` = `jmj_test`.`jmj_bm_block_statuses`.`snapping_id`) and (`jmj_test`.`jmj_bm_block_statuses`.`object_type` like '')), true)"
          }
        },
        {
          "table": {
            "table_name": "jmj_bm_blocks",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "block_id"
            ],
            "key_length": "4",
            "ref": [
              "jmj_test.jmj_bm_snapping.block_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 29,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "29.00",
              "eval_cost": "5.80",
              "prefix_cost": "131.21",
              "data_read_per_join": "6K"
            },
            "used_columns": [
              "block_id",
              "type",
              "properties",
              "company_id",
              "storefront_id"
            ]
          }
        },
        {
          "table": {
            "table_name": "jmj_bm_blocks_descriptions",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "block_id",
              "lang_code"
            ],
            "key_length": "10",
            "ref": [
              "jmj_test.jmj_bm_snapping.block_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 29,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "29.00",
              "eval_cost": "5.80",
              "prefix_cost": "166.01",
              "data_read_per_join": "5K"
            },
            "used_columns": [
              "block_id",
              "lang_code",
              "name"
            ]
          }
        },
        {
          "table": {
            "table_name": "default_content",
            "access_type": "ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "block_id",
              "snapping_id",
              "lang_code",
              "object_id"
            ],
            "key_length": "18",
            "ref": [
              "jmj_test.jmj_bm_snapping.block_id",
              "const",
              "jmj_test.jmj_bm_blocks_descriptions.lang_code",
              "const"
            ],
            "rows_examined_per_scan": 2,
            "rows_produced_per_join": 58,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "86.93",
              "eval_cost": "11.60",
              "prefix_cost": "264.54",
              "data_read_per_join": "12K"
            },
            "used_columns": [
              "snapping_id",
              "object_id",
              "object_type",
              "block_id",
              "lang_code",
              "content"
            ],
            "attached_condition": "<if>(is_not_null_compl(default_content), (`jmj_test`.`default_content`.`object_type` like ''), true)"
          }
        },
        {
          "table": {
            "table_name": "dynamic_object_content",
            "access_type": "ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "block_id"
            ],
            "key_length": "4",
            "ref": [
              "jmj_test.jmj_bm_snapping.block_id"
            ],
            "rows_examined_per_scan": 8,
            "rows_produced_per_join": 464,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "521.42",
              "eval_cost": "92.80",
              "prefix_cost": "878.76",
              "data_read_per_join": "101K"
            },
            "used_columns": [
              "object_id",
              "object_type",
              "block_id",
              "lang_code",
              "content"
            ],
            "attached_condition": "<if>(is_not_null_compl(dynamic_object_content), ((`jmj_test`.`dynamic_object_content`.`object_id` = 0) and (`jmj_test`.`dynamic_object_content`.`lang_code` = `jmj_test`.`jmj_bm_blocks_descriptions`.`lang_code`) and (`jmj_test`.`dynamic_object_content`.`object_type` like '')), true)"
          }
        }
      ]
    }
  }
}