Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9400b4ec03c5146eb4d0b5b03d91a3efa019eb88904b594b7f95fe073ee62ce0' 
  AND token = 'MGkHtJciXTMKpxVhWxTPocgnk02pS/xTymkaUSBNDE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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