Preheat the air fryer to 400°F (200°C) for 5 minutes.
Pat the chicken thighs dry with paper towels to remove excess moisture.
In a small bowl, combine garlic powder, smoked paprika, onion powder, salt, and black pepper.
Brush the chicken thighs with olive oil on all sides.
Sprinkle the seasoning mixture evenly over both sides of the chicken thighs, pressing gently to adhere.
Place the chicken thighs in a single layer in the air fryer basket, making sure they do not overlap.
Cook the chicken thighs 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 exterior is golden and crispy.
Remove the chicken thighs from the air fryer and let them rest for 5 minutes before serving.