McDonald's is not the only "convenient" source of food while on the run.
Boston Market is the bomb and has a drive thru
Noodles and Company doesn't have a drive thru but takes about 10 minutes in and out.
Chipotle or Q Doba would work in your situation if you paid some attention to the things you put on it. No drive thru but again, in and out in less than 10 minutes.
The old stand by - Subway.
There are always little pub type of bars that might be around your work or home that serve some of the best food around. I have a place by my work that makes a killer blackened tuna steak sandwich with feta cheese, a killer terriyaki chicken breast salad, etc.. You gotta look for these places ahead of time, though. They don't have drive thrus but you can call ahead and it won't take 15 minutes to put together your order.
Don't make excuses for eating like shit, bro. I know you can "get away" with the added shitty food but you shouldn't look at it like that. Growing is important but your health should be considered pretty damned important, also.
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