In a bowl, mix together butter, spices, salt and black pepper.
Coat the chicken breasts with the butter mixture evenly.
Grease the Air Fryer Basket with cooking spray and then slide inside.
Adjust the temperature of Air Fryer to 350 °F to preheat for 5 minutes.
After preheating, arrange the chicken breasts into the greased Air Fryer Basket in a single layer.
Slide the basket into Air Fryer and set the time for 21-23 minutes.
While cooking, flip the chicken breasts once after 15 minutes.
After cooking time is finished, remove the chicken breasts from Air Fryer and transfer into a large bowl.
With 2 forks, shred the meat and serve.