Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf80bc9cee067ed237422d3d85d285390587c7dcba7b5a1a2d51bd979dc7fd82' 
  AND token = 'oIZ+DMS9fPJI3BKIzS1NW1EkGu5CYS/B7yk1WRV6OYU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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