SELECT 
  cscart_product_feature_variants.variant_id, 
  cscart_product_feature_variants.position, 
  cscart_product_feature_variants.color, 
  cscart_product_feature_variant_descriptions.variant 
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 (
    10670, 10830, 12308, 12340, 12988, 13029, 
    13034, 13372, 13383, 13385, 14264, 
    14265, 13914, 13918, 13933, 13936, 
    10877, 10892, 12307, 12357, 13929, 
    10669, 10900, 12218, 12989, 13036, 
    13373, 14286, 13935, 10836, 10787, 
    10671, 10852, 10668, 12338, 12305, 
    13928
  ) 
ORDER BY 
  cscart_product_feature_variants.position ASC, 
  cscart_product_feature_variant_descriptions.variant ASC

Query time 0.00093

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "133.21"
    },
    "ordering_operation": {
      "using_temporary_table": true,
      "using_filesort": true,
      "nested_loop": [
        {
          "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": 37,
            "rows_produced_per_join": 37,
            "filtered": "100.00",
            "index_condition": "(`danishecarter_latest`.`cscart_product_feature_variants`.`variant_id` in (10670,10830,12308,12340,12988,13029,13034,13372,13383,13385,14264,14265,13914,13918,13933,13936,10877,10892,12307,12357,13929,10669,10900,12218,12989,13036,13373,14286,13935,10836,10787,10671,10852,10668,12338,12305,13928))",
            "cost_info": {
              "read_cost": "81.41",
              "eval_cost": "7.40",
              "prefix_cost": "88.81",
              "data_read_per_join": "97K"
            },
            "used_columns": [
              "variant_id",
              "color",
              "position"
            ]
          }
        },
        {
          "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": [
              "danishecarter_latest.cscart_product_feature_variants.variant_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 37,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "37.00",
              "eval_cost": "7.40",
              "prefix_cost": "133.21",
              "data_read_per_join": "111K"
            },
            "used_columns": [
              "variant_id",
              "variant",
              "lang_code"
            ]
          }
        }
      ]
    }
  }
}