Whisk together the sriracha, honey, lime juice, garlic, and sesame oil in a small bowl. Add the water a little at a time until the dressing loosens enough to drizzle. Set aside.
Pat the asparagus completely dry.
Heat the oil in a large skillet over high heat until it shimmers.
Add the asparagus in a single layer, leaving space between spears. Cook undisturbed for about 2 minutes, then toss or turn and cook for another 3 to 4 minutes, until bright green with dark, blistered patches.
Season with the salt in the last minute of cooking.
Transfer the asparagus to a serving plate, drizzle with the sriracha honey dressing, and scatter the sesame seeds on top.