SELECT 
  * 
FROM 
  jmj_product_feature_variants 
WHERE 
  variant_id IN (
    3230, 3246, 3247, 2103, 2104, 2105, 2108, 
    2111, 2112, 2113, 2114, 2115, 2116, 
    2117, 2125, 2126, 2127, 2148, 2153, 
    2162, 2168, 2174, 2179, 2182, 2183, 
    2185, 2191, 2192, 3220, 3221, 3222, 
    3223, 3224, 3225, 3226, 3227, 3228, 
    3229, 766
  )

Query time 0.00092

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "93.61"
    },
    "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": 39,
      "rows_produced_per_join": 39,
      "filtered": "100.00",
      "index_condition": "(`jmj_test`.`jmj_product_feature_variants`.`variant_id` in (3230,3246,3247,2103,2104,2105,2108,2111,2112,2113,2114,2115,2116,2117,2125,2126,2127,2148,2153,2162,2168,2174,2179,2182,2183,2185,2191,2192,3220,3221,3222,3223,3224,3225,3226,3227,3228,3229,766))",
      "cost_info": {
        "read_cost": "85.81",
        "eval_cost": "7.80",
        "prefix_cost": "93.61",
        "data_read_per_join": "60K"
      },
      "used_columns": [
        "variant_id",
        "feature_id",
        "url",
        "color",
        "position",
        "abt__ut2_color_style",
        "abt__ut2_multicolor"
      ]
    }
  }
}