SELECT 
  sd.param_id, 
  sd.param, 
  cscart_static_data_descriptions.descr, 
  sd.param_2, 
  sd.param_3, 
  sd.param_4, 
  sd.param_5, 
  sd.param_6, 
  sd.status, 
  sd.position, 
  sd.parent_id, 
  sd.id_path, 
  sd.class, 
  sd.param_type 
FROM 
  cscart_static_data AS sd 
  LEFT JOIN cscart_static_data_descriptions ON sd.param_id = cscart_static_data_descriptions.param_id 
  AND cscart_static_data_descriptions.lang_code = 'en' 
WHERE 
  sd.section = 'A' 
  AND sd.status = 'A' 
  AND sd.param_5 = '6' 
ORDER BY 
  sd.position

Query time 0.00095

JSON explain

{
  "query_block": {
    "select_id": 1,
    "read_sorted_file": {
      "filesort": {
        "sort_key": "sd.position",
        "table": {
          "table_name": "sd",
          "access_type": "ALL",
          "possible_keys": ["section"],
          "rows": 48,
          "filtered": 97.91666412,
          "attached_condition": "sd.section = 'A' and sd.`status` = 'A' and sd.param_5 = '6'"
        }
      }
    },
    "table": {
      "table_name": "cscart_static_data_descriptions",
      "access_type": "eq_ref",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "9",
      "used_key_parts": ["param_id", "lang_code"],
      "ref": ["dev.sd.param_id", "const"],
      "rows": 1,
      "filtered": 100,
      "attached_condition": "trigcond(cscart_static_data_descriptions.lang_code = 'en')"
    }
  }
}