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 (31) 
  AND cfv.parent_name IN ('filter_values_set') 
ORDER BY 
  cfv.order ASC

Query time 0.00149

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 = 31 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
1003 31 filter_values_set 1 Adaptive Catalyst N de
1004 31 filter_values_set 1 Carapace Catalyst N de
1005 31 filter_values_set 1 Chayula's Catalyst N de
1006 31 filter_values_set 1 Esh's Catalyst N de
1007 31 filter_values_set 1 Flesh Catalyst N de
1008 31 filter_values_set 1 Neural Catalyst N de
1009 31 filter_values_set 1 Reaver Catalyst N de
1010 31 filter_values_set 1 Sibilant Catalyst N de
1011 31 filter_values_set 1 Skittering Catalyst N de
1012 31 filter_values_set 1 Tul's Catalyst N de
1013 31 filter_values_set 1 Uul-Netol's Catalyst N de
1014 31 filter_values_set 1 Xoph's Catalyst N de