Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9dff8d17ff879f614b86fdd8ea0666674f7074bff5b7195deb9857642cb7011' 
  AND token = 'mzctxIRGz2VWmSWLSdwHe3sfEV+7BXxvoyjJVBlb47k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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