Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb96807447cc9e5d636fa6013a4d765057b1d2482c85e177aa60e34ccf53423b' 
  AND token = 'FSGx7YtRAXIy2c9juRfzbPNaVN4PaWCJUMKfU+hsMyM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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