Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper for easy cleanup.
Trim the tough, woody ends off the asparagus spears and place them on the prepared baking sheet.
Drizzle the asparagus with half of the olive oil and season with a pinch of sea salt and black pepper, tossing to coat evenly.
Roast the asparagus in the oven for 10 to 12 minutes until they are tender and slightly charred at the tips.
While the asparagus is roasting, pat the salmon fillet completely dry with a paper towel and season both sides with the remaining salt, pepper, and garlic powder.
Heat the remaining olive oil in a medium non-stick skillet over medium-high heat until the oil is shimmering.
Place the salmon fillet skin-side down in the hot skillet and press down gently with a spatula to ensure even contact for a crispy skin.
Sear the salmon for 4 to 5 minutes without moving it, then flip and cook for an additional 2 to 3 minutes until the fish is opaque and flakes easily.
Remove the salmon and asparagus from heat and serve immediately with a fresh squeeze of lemon juice over the top.