Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39ac74bea8e551b2b3f2bbfdeac76c894d00b11a9b352d25b6a7e7210e34df5d' 
  AND token = 'yA9Z3VfjtJ0kKNo5S9pRYLIlNTlcYsPsOBO1zaWeekE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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