SELECT 
  * 
FROM 
  jmj_product_feature_variants 
WHERE 
  variant_id IN (
    3246, 3247, 2103, 2104, 2110, 2112, 2114, 
    2115, 2143, 2145, 2148, 2151, 2152, 
    2154, 2170, 2180, 2183, 2189, 2192, 
    2200, 2204, 2205, 2225, 2230, 766
  )

Query time 0.01108

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "60.01"
    },
    "table": {
      "table_name": "jmj_product_feature_variants",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "variant_id"
      ],
      "key_length": "3",
      "rows_examined_per_scan": 25,
      "rows_produced_per_join": 25,
      "filtered": "100.00",
      "index_condition": "(`jmj_test`.`jmj_product_feature_variants`.`variant_id` in (3246,3247,2103,2104,2110,2112,2114,2115,2143,2145,2148,2151,2152,2154,2170,2180,2183,2189,2192,2200,2204,2205,2225,2230,766))",
      "cost_info": {
        "read_cost": "55.01",
        "eval_cost": "5.00",
        "prefix_cost": "60.01",
        "data_read_per_join": "38K"
      },
      "used_columns": [
        "variant_id",
        "feature_id",
        "url",
        "color",
        "position",
        "abt__ut2_color_style",
        "abt__ut2_multicolor"
      ]
    }
  }
}