To a large resealable plastic bag, add the chicken, sunflower oil, minced garlic, 1/2 tablespoon each of the seasoned salt, BBQ seasoning and garlic salt and 1/2 teaspoon of the black pepper and seal the bag. Gently massage to coat the chicken evenly. Marinate for 15 to 30 minutes.
Add the flour, cornmeal, cayenne and remaining 1/2 tablespoon each of the seasoned salt, BBQ seasoning and garlic salt and remaining 1/2 teaspoon black pepper to a separate resealable plastic bag. Seal and shake to combine.
When the chicken is done marinating, add a few pieces at a time to the seasoned flour and shake to coat. Remove the chicken from the bag and shake off the excess flour mixture. Place the chicken pieces on the air fryer rack in an even layer without the pieces touching.
Seal the fryer and cook until the chicken is golden brown and crispy and reaches an internal temperature of 165 degrees F, 30 to 40 minutes. Remove from the air fryer and serve.