SELECT 
  * 
FROM 
  jmj_product_feature_variants 
WHERE 
  variant_id IN (
    3232, 3246, 3247, 403, 404, 405, 382, 
    383, 413, 415, 416, 385, 387, 392, 393, 
    398, 399, 400, 407, 408, 409, 410, 519, 
    521, 418, 411, 412, 376, 377, 378, 380, 
    1676, 2242, 2243, 2244, 2245, 2246, 
    768, 769, 2250, 3156, 771, 2103, 2112, 
    2113, 2114, 2115, 2116, 2117, 2138, 
    2140, 2143, 2149, 2167, 2184, 2193, 
    2196, 2202, 2205, 2222, 2223, 2227, 
    766
  )

Query time 0.00106

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "151.21"
    },
    "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": 63,
      "rows_produced_per_join": 63,
      "filtered": "100.00",
      "index_condition": "(`jmj_test`.`jmj_product_feature_variants`.`variant_id` in (3232,3246,3247,403,404,405,382,383,413,415,416,385,387,392,393,398,399,400,407,408,409,410,519,521,418,411,412,376,377,378,380,1676,2242,2243,2244,2245,2246,768,769,2250,3156,771,2103,2112,2113,2114,2115,2116,2117,2138,2140,2143,2149,2167,2184,2193,2196,2202,2205,2222,2223,2227,766))",
      "cost_info": {
        "read_cost": "138.61",
        "eval_cost": "12.60",
        "prefix_cost": "151.21",
        "data_read_per_join": "97K"
      },
      "used_columns": [
        "variant_id",
        "feature_id",
        "url",
        "color",
        "position",
        "abt__ut2_color_style",
        "abt__ut2_multicolor"
      ]
    }
  }
}