SELECT 
  cscart_statuses.*, 
  cscart_status_descriptions.* 
FROM 
  cscart_statuses 
  LEFT JOIN cscart_status_descriptions ON cscart_status_descriptions.status_id = cscart_statuses.status_id 
  AND cscart_status_descriptions.lang_code = 'ru' 
WHERE 
  1 = 1 
  AND cscart_statuses.type = 'O' 
ORDER BY 
  cscart_statuses.position asc

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "read_sorted_file": {
      "filesort": {
        "sort_key": "cscart_statuses.position",
        "table": {
          "table_name": "cscart_statuses",
          "access_type": "ALL",
          "rows": 21,
          "filtered": 100,
          "attached_condition": "cscart_statuses.`type` = 'O'"
        }
      }
    },
    "table": {
      "table_name": "cscart_status_descriptions",
      "access_type": "eq_ref",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "9",
      "used_key_parts": ["status_id", "lang_code"],
      "ref": ["admin_test.cscart_statuses.status_id", "const"],
      "rows": 1,
      "filtered": 100,
      "attached_condition": "trigcond(cscart_status_descriptions.lang_code = 'ru')"
    }
  }
}