Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5346b472fe333c90cddf58f09dcaf8bdcc29110290f4b29460df58e5f20c4fcc' 
  AND token = 'ANI6F3nRjyxSjLDfj+cJ5Zi8dorjYT++1i+RS5bu/SE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}