Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd32a871a18809e755756976613603c9290539a393afa8d802fb2ae7a19d9e138' 
  AND token = 'UH05FMSMmS5QpkepwD/CWRiV55UPP42OW/RxKnFJFNk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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