SELECT 
  * 
FROM 
  jmj_product_feature_variants 
WHERE 
  variant_id IN (
    3246, 3247, 2103, 2105, 2106, 2107, 2112, 
    2113, 2114, 2115, 2116, 2117, 2118, 
    2119, 2122, 2135, 2137, 2138, 2142, 
    2143, 2148, 2151, 2152, 2154, 2164, 
    2168, 2170, 2181, 2189, 2190, 2192, 
    2193, 2195, 2196, 2197, 2198, 2200, 
    2201, 2202, 2205, 2213, 2216, 2218, 
    2221, 2223, 2224, 2226, 2228, 3238, 
    766
  )

Query time 0.00896

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "120.01"
    },
    "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": 50,
      "rows_produced_per_join": 50,
      "filtered": "100.00",
      "index_condition": "(`jmj_test`.`jmj_product_feature_variants`.`variant_id` in (3246,3247,2103,2105,2106,2107,2112,2113,2114,2115,2116,2117,2118,2119,2122,2135,2137,2138,2142,2143,2148,2151,2152,2154,2164,2168,2170,2181,2189,2190,2192,2193,2195,2196,2197,2198,2200,2201,2202,2205,2213,2216,2218,2221,2223,2224,2226,2228,3238,766))",
      "cost_info": {
        "read_cost": "110.01",
        "eval_cost": "10.00",
        "prefix_cost": "120.01",
        "data_read_per_join": "77K"
      },
      "used_columns": [
        "variant_id",
        "feature_id",
        "url",
        "color",
        "position",
        "abt__ut2_color_style",
        "abt__ut2_multicolor"
      ]
    }
  }
}