Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '878bb7b775b9f5f52070ae24c65197e1791a45863123d356bf49ae4f4e58f7ee' 
  AND token = 'iGp8zHCCXab30216XQsjEG0HbZT7ZolO5F8v+iQXM4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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