Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd71c61c9e8c3fa6ffd6f6ec357ba1397f01c7484481e7219e7cd4f4b35250e9' 
  AND token = 'QWy681e9lOcGURJTM4doYJFM2EqwckrRpsm5R117Wrs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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