Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13851b2f3647eb4cd617f0c9b1d02192bd076dfe4e1f7231c8688ea31a57ed7e' 
  AND token = 'WbdFQIQzdDHtRY8xC8WPN/itiHZ5mWMORnuTYYZ1wp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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