Trim the stem ends from the green beans. (It's okay to leave the thin string on the end, if it's still bright green and fresh.)
Place the beans in a large bowl. Drizzle with olive oil and sprinkle with seasoned salt and black pepper. Toss to coat.
Place the beans in the basket of an air fryer. Cook at 375° for 10 to 12 minutes, shaking the basket half-way through. Beans should be crispy and slightly blistered when finished.