Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07de5534f514cf14cce6d99357d6f5daf7d4e492fb31b7cc71cfc0608e1df942' 
  AND token = 'swGh9qD3rLUq/Q41JATXM9W/afm/TOmRlHxujcSu6dg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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