Forcing the door or drawers open to an antique piece of furniture is not advisable. You can probably locate a new skeleton key by visiting (call first) an antique store. Often they have a variety of skeleton keys around. Another place to check is a locksmith store. Often they have new skeleton keys for sale.
Dennis (cut2it)
Note: If you have additional questions just get back to me. If this answer satisfies your question just click on the "accept" button at this point.
C&onstructi&on C&onsultant
Over 40 yrs. as General Contractor for new const. & remodel - retired with time for you.