Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c35551c819a177b7b387c88f8df5a25be6b557eaa932a755ec18282269bf1b38' 
  AND token = '9UaE4Or5k4beSAQd2ziTH7FJkyFFo5av3PY0oHR5b9s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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