SELECT 
  * 
FROM 
  cscart_product_feature_variants 
WHERE 
  variant_id IN (
    1, 125, 211, 220, 223, 226, 227, 233, 230, 
    231, 236, 239, 241, 242, 244, 243, 245, 
    247, 248, 250, 251, 122, 121, 127, 149, 
    246, 120, 123, 152, 234, 146, 228, 50, 
    58, 147, 41, 40, 6, 249, 237, 238, 98, 
    217, 232, 170, 165
  )

Query time 0.00067

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "32.21"
    },
    "table": {
      "table_name": "cscart_product_feature_variants",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "variant_id"
      ],
      "key_length": "3",
      "rows_examined_per_scan": 46,
      "rows_produced_per_join": 46,
      "filtered": "100.00",
      "index_condition": "(`test_uchur_k`.`cscart_product_feature_variants`.`variant_id` in (1,125,211,220,223,226,227,233,230,231,236,239,241,242,244,243,245,247,248,250,251,122,121,127,149,246,120,123,152,234,146,228,50,58,147,41,40,6,249,237,238,98,217,232,170,165))",
      "cost_info": {
        "read_cost": "27.61",
        "eval_cost": "4.60",
        "prefix_cost": "32.21",
        "data_read_per_join": "71K"
      },
      "used_columns": [
        "variant_id",
        "feature_id",
        "url",
        "color",
        "position",
        "abt__ut2_color_style",
        "abt__ut2_multicolor"
      ]
    }
  }
}