Soaking in fresh water for a while would be best, but if you can't do that, leave it out in the rain, and if it doesn't rain, hose it off or douse it with a good soaking of fresh water.
Sea salts in the wood could be toxic, or harmful at least, to air plants, but they really don't take in a lot of nutrients through their roots. If you give it a good, prolonged rinse and let the sun bleach it, it should be fine by the time your weather warms up.