Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4225b166943fbd31e8757f3ee03598f100fcfebf16c29da549ce9b3ebda55e53' 
  AND token = 'Ak/Rtg1V649vycl6nun5YjFaUWx9ELXmfkdHgCtVOEA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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