Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23556818aec6292e5197bcdc695b9abd8074f39692f12a844e966b6c15a5f13e' 
  AND token = 'ejN+lfkU/+7rTWxT5TxyD6BDZ1lFFkUp9B91cwCcPF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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