Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cc87212bbd3a3675d0ebcdd75ff0fc210f819687d68075b9f5d658abc412858' 
  AND token = 'Tb9zT1npyCYzSPDDzfeMsGk4KMsCt7D1EOt74hFR5NA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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