Hi
It will depend if the box has a varnish, wax, paint or a dye on it, if it has been finished in some way.
I recommend lining the inside of the box with material. It can be a thick felt - velvet, couderoy, whatever you like - but its a barrier to the wood.
You can either cut and glue it straight onto the inside, or make material covered panels and position or glue them in - all sides, the base and the top of the lid as well.
I keep my Tarot decks in a bag and then place them in a the boxes (mostly) - both bag and material match, so its easy to know which is 'their' specific home.
This keeps them dry, and if they travel with you in the box, the padded helps keep them from bashing around inside.
Choose an acid free glue, there are some great cheap non toxic glues from craft stores.
You can place a sachet of dried herbs, or a few stem of lavender, or a small patch with a few drops of your favourite essential oil in there to perfume/cleanse/ the box too - even attatch a crystal to the lid.
The box below I lined with felt.
Blessings Elven x