SELECT 
  cscart_product_feature_variants.variant_id, 
  cscart_product_feature_variants.position, 
  cscart_product_feature_variants.color, 
  cscart_product_feature_variant_descriptions.variant, 
  cscart_product_feature_variant_descriptions.brand_logo 
FROM 
  cscart_product_feature_variants 
  LEFT JOIN cscart_product_feature_variant_descriptions ON cscart_product_feature_variants.variant_id = cscart_product_feature_variant_descriptions.variant_id 
  AND cscart_product_feature_variant_descriptions.lang_code = 'en' 
WHERE 
  cscart_product_feature_variants.variant_id IN (
    21446, 
    35793, 
    10405, 
    10348, 
    10448, 
    0, 
    35784, 
    20541, 
    20855, 
    34250, 
    51991, 
    23967, 
    20856, 
    35794, 
    20868, 
    35786, 
    18255, 
    20871, 
    23113, 
    10351, 
    34251, 
    18259, 
    35838, 
    28937, 
    23707, 
    35791, 
    18256, 
    23702, 
    20849, 
    20928, 
    21614, 
    52039, 
    29083, 
    41596, 
    30924, 
    20851, 
    20927, 
    32400, 
    51610, 
    32510, 
    20919, 
    51627, 
    51631, 
    34234, 
    51993, 
    51619, 
    35161, 
    52878, 
    35787, 
    35675, 
    36130, 
    36368, 
    52024, 
    50346, 
    39285, 
    34540, 
    51612, 
    40800, 
    21776, 
    23102, 
    35783, 
    21747, 
    52021, 
    41506, 
    20881, 
    23383, 
    26723, 
    41660, 
    46489, 
    42549, 
    36690, 
    47120, 
    38581, 
    23969, 
    47512, 
    30341, 
    51613, 
    50371, 
    49522, 
    49715, 
    49785, 
    49686, 
    50859, 
    10438, 
    49526, 
    50864, 
    45351, 
    52619, 
    52820, 
    42573, 
    45841, 
    53620, 
    52254, 
    21738, 
    52335, 
    54305, 
    54794, 
    54457, 
    55293, 
    55897, 
    31880, 
    40250, 
    48470, 
    53920, 
    57387, 
    10380, 
    53941, 
    58489, 
    58490, 
    58491, 
    10451, 
    59527, 
    59970, 
    60814, 
    60343, 
    60342, 
    60682, 
    60446, 
    61101, 
    61162, 
    48008, 
    61552, 
    55944, 
    61558, 
    59972, 
    61273, 
    62255, 
    62404, 
    54471, 
    22378
  ) 
ORDER BY 
  cscart_product_feature_variants.position ASC, 
  cscart_product_feature_variant_descriptions.variant ASC

Query time 0.00293

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "130.20"
    },
    "ordering_operation": {
      "using_temporary_table": true,
      "using_filesort": true,
      "nested_loop": [
        {
          "table": {
            "table_name": "cscart_product_feature_variants",
            "access_type": "range",
            "possible_keys": [
              "PRIMARY",
              "variant_feature_idx",
              "idx_var_feat_pos"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "variant_id"
            ],
            "key_length": "3",
            "rows_examined_per_scan": 130,
            "rows_produced_per_join": 130,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "45.58",
              "eval_cost": "13.00",
              "prefix_cost": "58.58",
              "data_read_per_join": "148K"
            },
            "used_columns": [
              "variant_id",
              "color",
              "position"
            ],
            "attached_condition": "(`cscart_db`.`cscart_product_feature_variants`.`variant_id` in (21446,35793,10405,10348,10448,0,35784,20541,20855,34250,51991,23967,20856,35794,20868,35786,18255,20871,23113,10351,34251,18259,35838,28937,23707,35791,18256,23702,20849,20928,21614,52039,29083,41596,30924,20851,20927,32400,51610,32510,20919,51627,51631,34234,51993,51619,35161,52878,35787,35675,36130,36368,52024,50346,39285,34540,51612,40800,21776,23102,35783,21747,52021,41506,20881,23383,26723,41660,46489,42549,36690,47120,38581,23969,47512,30341,51613,50371,49522,49715,49785,49686,50859,10438,49526,50864,45351,52619,52820,42573,45841,53620,52254,21738,52335,54305,54794,54457,55293,55897,31880,40250,48470,53920,57387,10380,53941,58489,58490,58491,10451,59527,59970,60814,60343,60342,60682,60446,61101,61162,48008,61552,55944,61558,59972,61273,62255,62404,54471,22378))"
          }
        },
        {
          "table": {
            "table_name": "cscart_product_feature_variant_descriptions",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "variant_id",
              "lang_code"
            ],
            "key_length": "9",
            "ref": [
              "cscart_db.cscart_product_feature_variants.variant_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 130,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "58.62",
              "eval_cost": "13.00",
              "prefix_cost": "130.20",
              "data_read_per_join": "972K"
            },
            "used_columns": [
              "variant_id",
              "variant",
              "lang_code",
              "brand_logo"
            ]
          }
        }
      ]
    }
  }
}