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 = 'en' 
WHERE 
  1 
  AND cfv.parent_id IN (1) 
  AND cfv.parent_name IN ('filter_values_set') 
ORDER BY 
  cfv.order ASC

Query time 0.00141

JSON explain

{
  "query_block": {
    "select_id": 1,
    "read_sorted_file": {
      "filesort": {
        "sort_key": "cfv.`order`",
        "table": {
          "table_name": "cfv",
          "access_type": "ALL",
          "rows": 1012,
          "filtered": 100,
          "attached_condition": "cfv.parent_id = 1 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 = 'en')"
    }
  }
}

Result

category_filter_value_id parent_id parent_name order title hint is_any lang_code
1 1 filter_values_set 1 Amnennar N en
2 1 filter_values_set 2 Ashbringer N en
3 1 filter_values_set 3 Auberdine N en
4 1 filter_values_set 4 Bloodfang N en
5 1 filter_values_set 5 Bonescythe N en
6 1 filter_values_set 6 Celebras N en
7 1 filter_values_set 7 Dragonfang N en
8 1 filter_values_set 8 Dreadmist N en
9 1 filter_values_set 9 Dreadnaught N en
10 1 filter_values_set 10 Earthshaker N en
11 1 filter_values_set 11 Eisenfeind N en
12 1 filter_values_set 12 Ewige Warte N en
13 1 filter_values_set 13 Finkle N en
14 1 filter_values_set 14 Firemaw N en
15 1 filter_values_set 15 Flamelash N en
16 1 filter_values_set 16 Flickwerk N en
17 1 filter_values_set 17 Gehennas N en
18 1 filter_values_set 18 Golemagg N en
19 1 filter_values_set 19 Großdrachenruf N en
20 1 filter_values_set 20 Herzensbrecher N en
21 1 filter_values_set 21 Hydraxian Waterlords N en
22 1 filter_values_set 22 Judgement N en
23 1 filter_values_set 23 Kingsfall N en
24 1 filter_values_set 24 Klingenhauer N en
25 1 filter_values_set 25 Lucifron N en
26 1 filter_values_set 26 Mandokir N en
27 1 filter_values_set 27 Mirage Raceway N en
28 1 filter_values_set 28 Mograine N en
29 1 filter_values_set 29 Nethergarde Keep N en
30 1 filter_values_set 30 Noggenfogger N en
31 1 filter_values_set 31 Pyrewood Village N en
32 1 filter_values_set 32 Quel'Serrar N en
33 1 filter_values_set 33 Razorgore N en
34 1 filter_values_set 34 Seenhain N en
35 1 filter_values_set 35 Shazzrah N en
36 1 filter_values_set 36 Skullflame N en
37 1 filter_values_set 37 Stonespine N en
38 1 filter_values_set 38 Sulfuron N en
39 1 filter_values_set 39 Ten Storms N en
40 1 filter_values_set 40 Tranzendenz N en
41 1 filter_values_set 41 Venoxis N en
42 1 filter_values_set 42 Zandalar Tribe N en