There are several methods for obtaining the current date and time:
NOW()/SYSDATE()/CURRENT_TIMESTAMP
CURDATE()/CURRENT_DATE
CURTIME()/CURRENT_TIME
mysql>
mysql> SELECT NOW();
+---------------------+
| NOW() |
+---------------------+
| 2007-07-23 18:58:25 |
+---------------------+
1 row in set (0.00 sec)
mysql> SELECT NOW()+0;
+-----------------------+
| NOW()+0 |
+-----------------------+
| 20070723185825.000000 |
+-----------------------+
1 row in set (0.00 sec)
mysql>