The food police will tell you that, unless the food is dry and shelf stable (e.g. uncooked rice, or bread, or other pantry items), it must be kept below 40 deg. F. (and that's the internal temp. of the food, not the air temp around it!). "Chilly" outside of a warmer car won't cut it.
Leaving them at room temperature is not a good idea. The "nasties" can multiply quite rapidly in cooked rice and pasta, especially with extra proteins around such as the chicken.