Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd18b6eb49edf620b7c0adccf7833b7810ea35f676c429e52dd7e5a7baf3d95e7' 
  AND token = 'IBrWhPO4Uyf5dhu0x/nL4k1cmgsC7hPj9MsLXKoAikE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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