Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3abc02cc5ee1e44a5f1a9d336de0092bfdde0eaa600f06230ee49f20e0f478fd' 
  AND token = 'BqYaoDo+PzM7DWRkoch0nyN9xM+8Wnn17zXFgjKQ4iI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}