SELECT 
  * 
FROM 
  jmj_product_feature_variants 
WHERE 
  variant_id IN (
    3232, 3246, 3247, 361, 362, 340, 367, 
    373, 374, 344, 349, 350, 355, 356, 357, 
    504, 335, 337, 559, 561, 364, 365, 366, 
    1676, 2242, 2243, 2244, 2245, 2246, 
    768, 769, 2250, 3156, 771, 2103, 2104, 
    2106, 2112, 2113, 2117, 2137, 2140, 
    2144, 2164, 2167, 2172, 2197, 2200, 
    2205, 2226, 2228, 2235, 766
  )

Query time 0.00165

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "127.21"
    },
    "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": 53,
      "rows_produced_per_join": 53,
      "filtered": "100.00",
      "index_condition": "(`jmj_test`.`jmj_product_feature_variants`.`variant_id` in (3232,3246,3247,361,362,340,367,373,374,344,349,350,355,356,357,504,335,337,559,561,364,365,366,1676,2242,2243,2244,2245,2246,768,769,2250,3156,771,2103,2104,2106,2112,2113,2117,2137,2140,2144,2164,2167,2172,2197,2200,2205,2226,2228,2235,766))",
      "cost_info": {
        "read_cost": "116.61",
        "eval_cost": "10.60",
        "prefix_cost": "127.21",
        "data_read_per_join": "81K"
      },
      "used_columns": [
        "variant_id",
        "feature_id",
        "url",
        "color",
        "position",
        "abt__ut2_color_style",
        "abt__ut2_multicolor"
      ]
    }
  }
}