Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8fc68f97a8676a4c11e81cc285d2ae4a8376f6933bfab9d6b7afe9ad7d654d83' 
  AND token = 'igaT8QxmaMWagEpQ4IXR2UsAHKepgbJRkG/e7FEZ/S8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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