Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4d17021c19ee0808d8bc8ccb9fa446afdf71b76299b7b50d1198337c6587f8b' 
  AND token = 'y9ePvgUvyKLbShbKWRzGL0iITxv5MOa4omVhk8P7I1w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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