Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c72a65ba79293973b229f74d5387e396f2d445d29b40bc94ad44b1fc80dfabe' 
  AND token = 'Tw7IO8QFxqeAHSgWjRePQ2jFg0bUszwQDghej2iRXBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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