Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9295ef51928be4d6474f9383cb596b5575582274274abc55e3858e2e06dd16d2' 
  AND token = 'wqNZAFicdUz5Vees6SUggsOChTATfRL01mfnWj18ytE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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