Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13e52073733b159e74191bd27376b3f2295856a75398a39900a5f4af741f3b8d' 
  AND token = 'kaTk1SvHgGICymuBxK1wwgb5yUROMy0OURiYgNf9pb0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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