SELECT * FROM history_items WHERE timeofhistory=(SELECT MAX(timeofhistory) FROM history_items)
The sub query will fetch the highest timestamp and then that is used as a condition for the query.
note: If you are using a version older than 8.1, then MIN and MAX is not able to use indexes, so instead use a ORDER BY and LIMIT clause
SELECT * FROM history_items ORDER BY timeofhistory DESC LIMIT 1
This will of course work for versions 8.1 and higher as well, it should be identical to MAX and MIN in time.