Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9bc2d7e1c5221a2cdfbc42120292f636b89e753a08bdf0b35d810a2b8fbd4ab' 
  AND token = 'ZlDH6n1rrVN1IN9myhpvR4WIgkEMDkGU0eOX62TIIWw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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