Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f708428ae8206a396bd2af8a8664590d810c7ba1b10ecf5dde6932b85fdd321' 
  AND token = 'NRtGdscnQetwodFAPbSaviUUAfXnefgatA0FL7dC5fc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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