Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c1bb700061bd59d8b89b95583d2e3a15cf738a4944d596c4747e4e5e62fcbb9' 
  AND token = 'swCNZtHiXdAgzeeiPNhFRi+KD3pPffaqmm1nwbzYr0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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