SELECT 
  cfv.category_filter_value_id, 
  cfv.parent_id, 
  cfv.parent_name, 
  cfv.order, 
  cfvd.title, 
  cfv.hint, 
  cfv.is_any, 
  cfvd.lang_code 
FROM 
  cscart_category_filter_values AS cfv 
  LEFT JOIN cscart_category_filter_value_descriptions AS cfvd ON cfv.category_filter_value_id = cfvd.category_filter_value_id 
  AND cfvd.lang_code = 'de' 
WHERE 
  1 
  AND cfv.parent_id IN (28) 
  AND cfv.parent_name IN ('filter_values_set') 
ORDER BY 
  cfv.order ASC

Query time 0.00136

JSON explain

{
  "query_block": {
    "select_id": 1,
    "read_sorted_file": {
      "filesort": {
        "sort_key": "cfv.`order`",
        "table": {
          "table_name": "cfv",
          "access_type": "ALL",
          "rows": 1025,
          "filtered": 100,
          "attached_condition": "cfv.parent_id = 28 and cfv.parent_name = 'filter_values_set'"
        }
      }
    },
    "table": {
      "table_name": "cfvd",
      "access_type": "eq_ref",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "10",
      "used_key_parts": ["category_filter_value_id", "lang_code"],
      "ref": ["dev.cfv.category_filter_value_id", "const"],
      "rows": 1,
      "filtered": 100,
      "attached_condition": "trigcond(cfvd.lang_code = 'de')"
    }
  }
}

Result

category_filter_value_id parent_id parent_name order title hint is_any lang_code
968 28 filter_values_set 1 Divine orbs N de
969 28 filter_values_set 2 Exalted orbs N de
970 28 filter_values_set 3 Arcanist's Etcher N de
971 28 filter_values_set 4 Armourer's scrap N de
972 28 filter_values_set 5 Artificer's orb N de
973 28 filter_values_set 6 Blacksmith's whetstone N de
974 28 filter_values_set 7 Chaos orbs N de
975 28 filter_values_set 8 Gemcutter's prism N de
976 28 filter_values_set 9 Glassblower's bauble N de
977 28 filter_values_set 10 Greater Jeweller's orbs N de
978 28 filter_values_set 11 Lesser Jeweller's orbs N de
979 28 filter_values_set 12 Orbs of alchemy N de
980 28 filter_values_set 13 Orbs of Annulment N de
981 28 filter_values_set 13 Orbs of Augmentation N de
982 28 filter_values_set 13 Orbs of Chance N de
983 28 filter_values_set 13 Orbs of Transmutation N de
984 28 filter_values_set 13 Perfect Jeweller's orbs N de
985 28 filter_values_set 13 Regal orbs N de
986 28 filter_values_set 13 Vaal orbs N de