SELECT 
  tmall_product_reviews.*, 
  tmall_users.company_id as reply_company_id, 
  tmall_companies.company as reply_company, 
  tmall_country_descriptions.country as country 
FROM 
  tmall_product_reviews 
  LEFT JOIN tmall_users ON tmall_product_reviews.reply_user_id = tmall_users.user_id 
  LEFT JOIN tmall_companies ON tmall_users.company_id = tmall_companies.company_id 
  LEFT JOIN tmall_country_descriptions ON tmall_product_reviews.country_code = tmall_country_descriptions.code 
  AND tmall_country_descriptions.lang_code = 'en' 
WHERE 
  1 
  AND tmall_product_reviews.product_id IN (5) 
  AND tmall_product_reviews.status = 'A' 
ORDER BY 
  tmall_product_reviews.product_review_timestamp desc

Query time 0.00778

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.020872583,
    "nested_loop": [
      {
        "read_sorted_file": {
          "filesort": {
            "sort_key": "tmall_product_reviews.product_review_timestamp desc",
            "table": {
              "table_name": "tmall_product_reviews",
              "access_type": "ref",
              "possible_keys": ["idx_product_id"],
              "key": "idx_product_id",
              "key_length": "3",
              "used_key_parts": ["product_id"],
              "ref": ["const"],
              "loops": 1,
              "rows": 3,
              "cost": 0.004492149,
              "filtered": 100,
              "attached_condition": "tmall_product_reviews.product_id <=> 5 and tmall_product_reviews.`status` = 'A'"
            }
          }
        }
      },
      {
        "table": {
          "table_name": "tmall_users",
          "access_type": "eq_ref",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["user_id"],
          "ref": ["tmall.tmall_product_reviews.reply_user_id"],
          "loops": 3,
          "rows": 1,
          "cost": 0.005391878,
          "filtered": 100
        }
      },
      {
        "table": {
          "table_name": "tmall_companies",
          "access_type": "eq_ref",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "4",
          "used_key_parts": ["company_id"],
          "ref": ["tmall.tmall_users.company_id"],
          "loops": 3,
          "rows": 1,
          "cost": 0.005391878,
          "filtered": 100,
          "attached_condition": "trigcond(trigcond(tmall_users.company_id is not null))"
        }
      },
      {
        "table": {
          "table_name": "tmall_country_descriptions",
          "access_type": "eq_ref",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "12",
          "used_key_parts": ["code", "lang_code"],
          "ref": ["tmall.tmall_product_reviews.country_code", "const"],
          "loops": 3,
          "rows": 1,
          "cost": 0.005596678,
          "filtered": 100,
          "attached_condition": "trigcond(tmall_country_descriptions.lang_code = 'en')"
        }
      }
    ]
  }
}