Try dumping this into a command window:
"c:\Program Files\SWsoft\Plesk\Databases\MySQL\bin\mysql.exe" -uadmin -P8306 -p -Dpsa -e"select c.cname, c.pname, c.login, FROM_UNIXTIME(l.value) as Expiry from clients c, limits l where c.limits_id = l.id and l.limit_name = 'expiration' order by l.value;"
or even just
"c:\Program Files\SWsoft\Plesk\Databases\MySQL\bin\mysql.exe" -uadmin -P8306 -p -Dpsa -e"select c.pname, c.login, FROM_UNIXTIME(l.value) as Expiry from clients c, limits l where c.limits_id = l.id and l.limit_name = 'expiration' order by l.value;"
and entering in the plesk admin password when it asks.
This wont allow you to order the sites, but should generate a list for you of who's expiring and when.
-Sean.