Preheat the air fryer to 400°F (200°C) for 5 minutes.
In a large bowl, combine the olive oil, garlic powder, smoked paprika, onion powder, salt, and black pepper.
Add the boneless skinless chicken thighs to the bowl and toss until they are evenly coated with the seasoning mixture.
Place the chicken thighs in a single layer in the air fryer basket, making sure they do not overlap.
Cook the chicken thighs in the air fryer at 400°F (200°C) for 9 minutes.
Flip the chicken thighs over and cook for an additional 9 minutes, or until the internal temperature reaches 165°F (74°C) and the chicken is cooked through.
Remove the chicken thighs from the air fryer and let them rest for 3 minutes before serving.