SELECT 
  * 
FROM 
  jmj_product_feature_variants 
WHERE 
  variant_id IN (
    3232, 3246, 3247, 891, 895, 897, 903, 
    904, 906, 918, 920, 921, 925, 2103, 2107, 
    2109, 2130, 2136, 2154, 2163, 2165, 
    2167, 2168, 2174, 2179, 2194, 2219, 
    3238, 766
  )

Query time 0.00061

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "69.61"
    },
    "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": 29,
      "rows_produced_per_join": 29,
      "filtered": "100.00",
      "index_condition": "(`jmj_test`.`jmj_product_feature_variants`.`variant_id` in (3232,3246,3247,891,895,897,903,904,906,918,920,921,925,2103,2107,2109,2130,2136,2154,2163,2165,2167,2168,2174,2179,2194,2219,3238,766))",
      "cost_info": {
        "read_cost": "63.81",
        "eval_cost": "5.80",
        "prefix_cost": "69.61",
        "data_read_per_join": "44K"
      },
      "used_columns": [
        "variant_id",
        "feature_id",
        "url",
        "color",
        "position",
        "abt__ut2_color_style",
        "abt__ut2_multicolor"
      ]
    }
  }
}