Answer:
I am a box that holds keys without locks, yet they can unlock your soul.
What stays the same size no matter how much they weight?
Flat as a leaf, round as a ring. Has two eyes, can't see a thing.
You seek it out, when your hunger is ripe. It sits on four legs, and smokes a pipe.
I am nothing really at all, Yet I am easily foundΝΎ Ignore me at your own peril, and you might end up crowned!
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.