SELECT 
  * 
FROM 
  jmj_product_feature_variants 
WHERE 
  variant_id IN (
    2638, 3150, 3152, 3155, 3246, 3247, 2103, 
    2104, 2105, 2106, 2107, 2108, 2109, 
    2110, 2111, 2112, 2113, 2114, 2115, 
    2116, 2117, 2118, 2119, 2120, 2122, 
    2125, 2126, 2131, 2134, 2135, 2136, 
    2137, 2138, 2141, 2142, 2143, 2144, 
    2147, 2148, 2149, 2151, 2153, 2154, 
    2163, 2164, 2165, 2167, 2168, 2170, 
    2175, 2176, 2177, 2179, 2180, 2181, 
    2185, 2186, 2187, 2190, 2191, 2194, 
    2206, 2207, 2217, 2218, 2220, 2221, 
    2222, 2223, 3238, 766
  )

Query time 0.01259

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "170.41"
    },
    "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": 71,
      "rows_produced_per_join": 71,
      "filtered": "100.00",
      "index_condition": "(`jmj_test`.`jmj_product_feature_variants`.`variant_id` in (2638,3150,3152,3155,3246,3247,2103,2104,2105,2106,2107,2108,2109,2110,2111,2112,2113,2114,2115,2116,2117,2118,2119,2120,2122,2125,2126,2131,2134,2135,2136,2137,2138,2141,2142,2143,2144,2147,2148,2149,2151,2153,2154,2163,2164,2165,2167,2168,2170,2175,2176,2177,2179,2180,2181,2185,2186,2187,2190,2191,2194,2206,2207,2217,2218,2220,2221,2222,2223,3238,766))",
      "cost_info": {
        "read_cost": "156.21",
        "eval_cost": "14.20",
        "prefix_cost": "170.41",
        "data_read_per_join": "109K"
      },
      "used_columns": [
        "variant_id",
        "feature_id",
        "url",
        "color",
        "position",
        "abt__ut2_color_style",
        "abt__ut2_multicolor"
      ]
    }
  }
}