SELECT 
  f.faq_item_id, 
  f.faq_id, 
  f.position, 
  fd.question, 
  fd.answer, 
  fd.lang_code 
FROM 
  cscart_faq_items AS f 
  LEFT JOIN cscart_faq_descriptions AS fd ON fd.faq_item_id = f.faq_item_id 
  AND fd.lang_code = 'en' 
WHERE 
  1 
  AND f.faq_id = 1 
ORDER BY 
  f.position ASC

Query time 0.00066

JSON explain

{
  "query_block": {
    "select_id": 1,
    "read_sorted_file": {
      "filesort": {
        "sort_key": "f.position",
        "table": {
          "table_name": "f",
          "access_type": "ALL",
          "rows": 11,
          "filtered": 100,
          "attached_condition": "f.faq_id = 1"
        }
      }
    },
    "table": {
      "table_name": "fd",
      "access_type": "eq_ref",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "10",
      "used_key_parts": ["faq_item_id", "lang_code"],
      "ref": ["dev.f.faq_item_id", "const"],
      "rows": 1,
      "filtered": 100,
      "attached_condition": "trigcond(fd.lang_code = 'en')"
    }
  }
}