Question

I am having join query that seems fetching slowly. How can I optimize it, or it is
reasonable?

time to execute
29 total, Query took 1.6956 sec

mysql query

SELECT SQL_CALC_FOUND_ROWS
  t2.AuctionID ,t2.product_name ,t3.user_name ,t1.date_time ,t1.owned_price
  ,t2.specific_product_id
FROM table_user_ownned_auction AS t1 
INNER JOIN table_product AS t2 ON t1.specific_product_id=t2.specific_product_id
INNER JOIN table_user_information AS t3 ON t3.user_id=t1.user_id  
ORDER BY ownned_id DESC

Here’s the explain output

Answer 1

Looking at the explain output, your problem is in

The second line: The join with table t1.
Put an index on t1.specific_product_id and t2.specific_product_id.

the first line has one 3 rows in it, using filesort on that is actually faster than using the index because it saves on I/O-time.

The following code will add an index to t2.specific_product_id.

ALTER TABLE table_product ADD INDEX spi(specific_product_id); 

Because you only have 29 rows of output, using the index should speed up your query to instantaneous.