Preheat your oven to 400°F (200°C).
Pat the chicken thighs completely dry with a paper towel to ensure a perfect sear, then season both sides evenly with sea salt, black pepper, garlic powder, and smoked paprika.
Heat 0.5 tbsp of olive oil in a large oven-safe skillet over medium-high heat until shimmering.
Place the chicken thighs in the skillet and sear for 5-7 minutes without moving them, until the bottom is deeply golden and crispy.
While the chicken sears, trim the woody ends off the asparagus and toss the spears in a bowl with the remaining 0.5 tbsp of olive oil, minced garlic, and lemon juice.
Flip the chicken thighs over and arrange the seasoned asparagus in a single layer around the chicken in the skillet.
Transfer the skillet to the oven and roast for 12-15 minutes, or until the chicken reaches an internal temperature of 165°F and the asparagus is tender-crisp.
Remove from the oven and let the chicken rest for 3 minutes before serving to allow the juices to redistribute.