Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34577b1900742bb21487d8d36167ec4b78f2bbecd1ab7ccba0c4905c9d723af0' 
  AND token = 'bSQm9TQxVO3dUCxjM7ViIlR04da0KYNpH0VedvqxKjA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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