SELECT 
  jmj_product_feature_variant_descriptions.variant, 
  jmj_product_feature_variants.variant_id, 
  jmj_product_feature_variants.feature_id, 
  jmj_product_features_values.variant_id as selected, 
  jmj_product_features.feature_type, 
  jmj_product_feature_variants.color, 
  jmj_product_feature_variants.color, 
  jmj_product_features_values.value_int, 
  jmj_product_feature_variants.abt__ut2_multicolor, 
  jmj_product_feature_variants.abt__ut2_color_style 
FROM 
  jmj_product_feature_variants 
  LEFT JOIN jmj_product_feature_variant_descriptions ON jmj_product_feature_variant_descriptions.variant_id = jmj_product_feature_variants.variant_id 
  AND jmj_product_feature_variant_descriptions.lang_code = 'en' 
  INNER JOIN jmj_product_features_values ON jmj_product_features_values.variant_id = jmj_product_feature_variants.variant_id 
  AND jmj_product_features_values.lang_code = 'en' 
  AND jmj_product_features_values.product_id = 821 
  AND jmj_product_features_values.feature_id = jmj_product_feature_variants.feature_id 
  LEFT JOIN jmj_product_features ON jmj_product_features.feature_id = jmj_product_feature_variants.feature_id 
WHERE 
  1 
  AND jmj_product_feature_variants.feature_id IN (
    31, 370, 371, 372, 374, 373, 375, 376, 
    378, 379, 380, 377, 255, 280, 132
  ) 
GROUP BY 
  jmj_product_feature_variants.variant_id 
ORDER BY 
  jmj_product_feature_variants.position, 
  jmj_product_feature_variant_descriptions.variant

Query time 0.01721

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "46.48"
    },
    "ordering_operation": {
      "using_filesort": true,
      "grouping_operation": {
        "using_temporary_table": true,
        "using_filesort": false,
        "nested_loop": [
          {
            "table": {
              "table_name": "jmj_product_features_values",
              "access_type": "ref",
              "possible_keys": [
                "PRIMARY",
                "fl",
                "variant_id",
                "lang_code",
                "product_id",
                "fpl",
                "idx_product_feature_variant_id"
              ],
              "key": "product_id",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "const"
              ],
              "rows_examined_per_scan": 25,
              "rows_produced_per_join": 11,
              "filtered": "46.85",
              "cost_info": {
                "read_cost": "25.00",
                "eval_cost": "2.34",
                "prefix_cost": "30.00",
                "data_read_per_join": "9K"
              },
              "used_columns": [
                "feature_id",
                "product_id",
                "variant_id",
                "value_int",
                "lang_code"
              ],
              "attached_condition": "((`jmj_test`.`jmj_product_features_values`.`feature_id` in (31,370,371,372,374,373,375,376,378,379,380,377,255,280,132)) and (`jmj_test`.`jmj_product_features_values`.`lang_code` = 'en'))"
            }
          },
          {
            "table": {
              "table_name": "jmj_product_feature_variants",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "feature_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "variant_id"
              ],
              "key_length": "3",
              "ref": [
                "jmj_test.jmj_product_features_values.variant_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 1,
              "filtered": "8.63",
              "cost_info": {
                "read_cost": "11.71",
                "eval_cost": "0.20",
                "prefix_cost": "44.05",
                "data_read_per_join": "1K"
              },
              "used_columns": [
                "variant_id",
                "feature_id",
                "color",
                "position",
                "abt__ut2_color_style",
                "abt__ut2_multicolor"
              ],
              "attached_condition": "(`jmj_test`.`jmj_product_feature_variants`.`feature_id` = `jmj_test`.`jmj_product_features_values`.`feature_id`)"
            }
          },
          {
            "table": {
              "table_name": "jmj_product_features",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "feature_id"
              ],
              "key_length": "3",
              "ref": [
                "jmj_test.jmj_product_features_values.feature_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 1,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "1.01",
                "eval_cost": "0.20",
                "prefix_cost": "45.27",
                "data_read_per_join": "444"
              },
              "used_columns": [
                "feature_id",
                "feature_type"
              ]
            }
          },
          {
            "table": {
              "table_name": "jmj_product_feature_variant_descriptions",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "variant_id",
                "lang_code"
              ],
              "key_length": "9",
              "ref": [
                "jmj_test.jmj_product_features_values.variant_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 1,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "1.01",
                "eval_cost": "0.20",
                "prefix_cost": "46.48",
                "data_read_per_join": "3K"
              },
              "used_columns": [
                "variant_id",
                "variant",
                "lang_code"
              ]
            }
          }
        ]
      }
    }
  }
}