In that case, you should be able to figure out which album it is in based on the albums right? I mean, your albums aren't just assortments of random photos. So use whatever organizational logic you used to make the albums. For instance, if it is a picture of a flower you took while on a trip to France, then maybe you have it in an album of flower pictures and an album of your trip to France.
Or, you could go into each album, select all of the photos, then assign a keyword to them all, perhaps the same as the name of the album. Do that for each album you suspect the photo to be in. Then look at the photo in your library and see which keywords are applied to it.