Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60a45bfd2810dd92335fa0d5398ad7ccf0a573e17b9ca280f8ce2f31f1d6d7ba' 
  AND token = 'oFTgB72ZFU3XmwA0hEBnqsbApqJ56akXrRrFOoXgpE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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