I keep dreaming about keys that don't fit any lock

Last night I was wandering a house where every door had a tiny glowing keyhole, but the key I held was always melting or turning to mist right before I could try it. Not scary exactly, just... this ache of almost. Woke up and checked my real keys and they were fine, but I couldn't shake the feeling that I want someone to hand me the right key without me even asking.