A good, clear polyurethane spray applied in light coats and light-sanded between coats should give you what you are looking for, as I understand your question. There are many, many choices of finish types available, and methods people use with them. The polyurethane finish is probably one of the quickest ones around, and will give a quite serviceable and pleasing finish if you take just a little time with it.
It should be available at most any hardware store around under various brand names.