Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '023586c16e80101c8b7c742109f1c683db8bc7121d0994e270a6542dab7bbaa8' 
  AND token = 'UmXfGHuY0iDvUY2rO4oYC03YgaAhzSASeEVoPr6K+AE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00167

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}