Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbfdcad44ed8c4ad0ea0bdd84f2e7fa839dc5dbe69ceabd9ba6bf7fdc7e68cbb' 
  AND token = 'GOJHzKvJeUiIuTSDe5VIzr0U5jKTF8W2+fiZPvVDyZk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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