Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdcee671ee4295cec651a82493fc463e9ff310be747902c7ee06d41353c565e2' 
  AND token = 'I7+LMOVJpbEXaNn8xjxR7KSv12unrv65zYZJHfLgNu0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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