Pat chicken thighs dry with paper towel. Trim excess fat. Rub with olive oil, then add old bay seasoning to coat evenly.
Heat a cast iron or oven safe nonstick skillet over high heat. Once hot, add chicken thighs, skin side down. Sear for 5 minutes or until skin is browned. Flip over.
Transfer pan to preheated oven. Cook for an additional 20-22 minutes or until chicken reaches an internal temperature of 165°F.