If it hasn't been more than 5-7 days I'd say there's hope.

Try poking some holes in the bottom of a plastic baggie with a thumbtack or something then putting the moist paper towels inside, seal it up and tape the baggie to the inside of a box or something, just so long as it stands upright. This way excess water can drain from the baggie and seeds can grow a taproot downward naturally. Just open the baggie every once in awhile to check the seeds and mist if they need moisture, it could take a few days to sprout them all and some will have more vigour, that's normal.

4 out of 5 is good but I think you still have a chance to get all five

Good luck bro
Peace