My only recommendation is to have that command locked or only granted to the server-op by default, because if you have a few leads/mgmt's and admins working or just playing with that command, I can see it taking down the MySQL database really quick, even worse the server.
As Cavedude said, it took him 2 seconds to querey outside the server (assuming machine to machine) so some of that is overhead from the internet but keep in mind, a querey that takes longer than a second on a decent machine causes a decent amount of load multiply that by two or three at the same time, it could be enough to take a server on the verge of a 'strain' completely down.
Again I'd suggest locking that command down and even securing it, because I'm sure that could be an exploit waiting to happen.
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