Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89ad92a257d893cd4a37f1ea6f2f630dbd965ee82b3daceebfa2d40bce75d092' 
  AND token = 'w3RaHINTb4+yqsTD3CaH1DvWuy/pBrOyXU2pY3me0K8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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