A chicken bowl with extra veggies and no rice makes a good, quick, accessible low carb meal.
Problem is, what do you do if you're so freaking busy that you don't have time for one of these?
No two ways about it: ya gotta prepare. In advance. For the worst case scenario. Which, for me, ends up being most of the time.
Make and pack so-called "emergency protein" in a cold pack lunch, or the fridge. Do it on your downtime, once a week, so you have a weeks worth of food prepacked in advance.
Ready for when you're so busy you you can't even think, but at least you can eat right.