Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bf04374b79b0c4b84e619650620a56cf572c966776a937801844d44325681cb' 
  AND token = 'Fu9ptDIo5mbUByEhDfMnmmloq/qcYW2YbdmEVHx5Z64=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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