Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87f1692e7798b3745159745402f62d010bdbb3d1142272942b411ada814fcdd4' 
  AND token = 'V5H4nrtz6H8U6pFKrZhbI5a/nDpdq1044H/yR5oBZ60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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