Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c42b4d8e2440881fc3c8cd304e0017579fdfbf26a7d4f6ec1055f71c6ed8f1f' 
  AND token = 'zNtGH+6Tm3HeBhiVVmkYUZF5ReZrY1EThpe8ZdjYM3k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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