Can I transfer planes in Canada with a DUI?

So from what I have read, it's true that I cannot go to Canada from the U.S. if I have a DUI, which is fine (even though I think it's stupid I live 2 hours away and can't cross the border) however I am going to Europe in August and I have a plane transfer in Toronto, is this going to be an issue? Because I have other things booked and may layover there is only 50 minutes, so I won't have time to be ridiculed with questions by Canadian national security or whatever. I would assume it would be fine, I just wanted some reassurance. Thank you!