SELECT 
  * 
FROM 
  jmj_product_feature_variants 
WHERE 
  variant_id IN (
    3149, 3150, 3158, 3233, 3245, 3246, 3247, 
    3157, 1688, 1689, 1690, 1691, 1692, 
    1693, 1699, 1700, 1701, 1703, 1704, 
    2103, 2104, 2105, 2106, 2107, 2110, 
    2112, 2113, 2114, 2115, 2116, 2117, 
    2118, 2120, 2121, 2122, 2125, 2126, 
    2127, 2128, 2129, 2131, 2132, 2133, 
    2143, 2145, 2148, 2153, 2154, 2163, 
    2164, 2174, 2179, 2181, 2183, 2185, 
    2195, 2206, 2207, 2208, 2209, 2214, 
    2230, 2235, 766
  )

Query time 0.00913

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "153.61"
    },
    "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": 64,
      "rows_produced_per_join": 64,
      "filtered": "100.00",
      "index_condition": "(`jmj_test`.`jmj_product_feature_variants`.`variant_id` in (3149,3150,3158,3233,3245,3246,3247,3157,1688,1689,1690,1691,1692,1693,1699,1700,1701,1703,1704,2103,2104,2105,2106,2107,2110,2112,2113,2114,2115,2116,2117,2118,2120,2121,2122,2125,2126,2127,2128,2129,2131,2132,2133,2143,2145,2148,2153,2154,2163,2164,2174,2179,2181,2183,2185,2195,2206,2207,2208,2209,2214,2230,2235,766))",
      "cost_info": {
        "read_cost": "140.81",
        "eval_cost": "12.80",
        "prefix_cost": "153.61",
        "data_read_per_join": "99K"
      },
      "used_columns": [
        "variant_id",
        "feature_id",
        "url",
        "color",
        "position",
        "abt__ut2_color_style",
        "abt__ut2_multicolor"
      ]
    }
  }
}