Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad191070352c08c80ce12f3e59cbd3e7224694d17b945e224e1b563f38dc2ce3' 
  AND token = 'ztAQkU7wH0OFSdYDOMXBynIAxcChOVN6ZKWFARkEnDI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}