Getting midnight of today I want to get 00:00:00 of a day.  Should be done without using CONCAT. What options are there?

We can use CURDATE() function in select query but need to display like 2014-05-05 00:00:00. If NOW() will give like 2014-05-05 12:05:37.

I want add default value 00:00:00 with CURDATE() in query.
The documentation surprisigly contains a solution:

SELECT timestamp(current_date);


(which is basically the same as a comment above).