SELECT 
  cscart_categories.category_id, 
  cscart_categories.parent_id, 
  cscart_categories.id_path, 
  cscart_category_descriptions.category, 
  cscart_categories.position, 
  cscart_categories.status, 
  cscart_categories.company_id 
FROM 
  cscart_categories 
  LEFT JOIN cscart_category_descriptions ON cscart_categories.category_id = cscart_category_descriptions.category_id 
  AND cscart_category_descriptions.lang_code = 'ja' 
WHERE 
  1 = 1 
  AND (
    cscart_categories.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, cscart_categories.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, cscart_categories.usergroup_ids
    )
  ) 
  AND cscart_categories.status IN ('A') 
  AND cscart_categories.id_path LIKE '166/%' 
ORDER BY 
  cscart_categories.is_trash asc, 
  cscart_categories.position asc, 
  cscart_category_descriptions.category asc

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "filesort": {
      "sort_key": "cscart_categories.is_trash, cscart_categories.position, cscart_category_descriptions.category",
      "temporary_table": {
        "table": {
          "table_name": "cscart_categories",
          "access_type": "ALL",
          "possible_keys": ["c_status", "id_path"],
          "rows": 83,
          "filtered": 40.96385574,
          "attached_condition": "(cscart_categories.usergroup_ids = '' or find_in_set(0,cscart_categories.usergroup_ids) or find_in_set(1,cscart_categories.usergroup_ids)) and cscart_categories.`status` = 'A' and cscart_categories.id_path like '166/%'"
        },
        "table": {
          "table_name": "cscart_category_descriptions",
          "access_type": "eq_ref",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "9",
          "used_key_parts": ["category_id", "lang_code"],
          "ref": ["smscrm_edev.cscart_categories.category_id", "const"],
          "rows": 1,
          "filtered": 100,
          "attached_condition": "trigcond(cscart_category_descriptions.lang_code = 'ja')"
        }
      }
    }
  }
}

Result

category_id parent_id id_path category position status company_id
176 175 166/175/176 GPS & カーナビ 10 A 0
235 234 166/234/235 iPhone 10 A 0
178 177 166/177/178 iPod 10 A 0
190 174 166/174/190 LED TV 10 A 0
198 196 166/196/198 デジタルカメラ 10 A 0
255 263 166/254/263/255 マイクロソフト 10 A 0
182 177 166/177/182 Android 20 A 0
236 234 166/234/236 HTC 20 A 0
185 175 166/175/185 カーステレオ 20 A 0
175 166 166/175 カー用品 20 A 0
197 196 166/196/197 デジタル一眼 20 A 0
191 174 166/174/191 プラズマTV 20 A 0
193 174 166/174/193 3D対応TV 30 A 0
174 166 166/174 AV機器 30 A 0
179 177 166/177/179 MP3プレーヤー 30 A 0
186 175 166/175/186 スピーカー 30 A 0
199 196 166/196/199 ビデオカメラ 30 A 0
240 234 166/234/240 モトローラ 30 A 0
194 174 166/174/194 DVD & Blu-rayプレーヤー 40 A 0
180 177 166/177/180 MP3スピーカーシステム 40 A 0
202 175 166/175/202 サブウーファー 40 A 0
238 234 166/234/238 ノキア 40 A 0
200 196 166/196/200 レンズ 40 A 0
234 166 166/234 携帯電話 40 A 0
187 175 166/175/187 アンプ 50 A 0
237 234 166/234/237 サムソン 50 A 0
181 177 166/177/181 ヘッドフォン 50 A 0
195 174 166/174/195 ホームシアターシステム 50 A 0
177 166 166/177 携帯音楽プレーヤー 50 A 0
196 166 166/196 デジカメ & ビデオ 60 A 0
188 175 166/175/188 車載DVD & ビデオ 60 A 0
254 166 166/254 ゲーム機本体 70 A 0
189 175 166/175/189 レーダー探知機 70 A 0
263 254 166/254/263 本体 160 A 0