Preheat an air fryer to 400ºF and line a small baking sheet with parchment paper.
Pat the chicken tenders dry with a paper towel and season with salt and pepper.
In a small size bowl, whisk the egg. In another medium size bowl, combine the panko breadcrumbs, garlic powder, onion powder, paprika, and mustard powder, if using.
Dip the chicken into the beaten egg, then toss into the panko mixture. Dust off any excess panko mixture and lay the chicken tenders on the prepared baking sheet. Repeat for the remaining chicken and place them on the baking sheet.
Air fry for 8 minutes, flipping halfway through, until the chicken is golden. Enjoy immediately with any dip you like.