Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bfa685c6c843b97b8660421ff51643d9697197ad26a7e46beb155af557841b15' 
  AND token = 'z/Sx07cavVlgMdvV+A4ld8WrFAB4X79IGTqTOnFzFXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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