Wiping the wood trays with 70% rubbing alcohol could be an extra precaution. A dilute bleach solution (1 oz per 16 oz water) would also work, but could bleach or stain the wood or raise the grain. As is oft directed “test in an inconspicuous area” first. Either solution should be in contact for 5 min for best effectiveness. Allow to air dry.

I don’t think it necessary if you don’t see anything on the wood, but I might do this with the tray where you found the cigars with mold.