Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c20ff563e475be8c8db36e5cdd3b1486b43b9c6eb627a8865ac1f33ac2a7c8b' 
  AND token = 't12T5VUGh9x6CDIefLQtcw7t/J5vDUFA1FkNcEFVf9E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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