Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6854a822f9bd343804d0e77dec208e798a3304c12fd0a3539a7e3f7b59f6b722' 
  AND token = 'PPFGIk4kDut/TKAnMX7bSdcdTIDaFc2o29ZCo2ZDL3g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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