Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '57e2a5158556a8290b49f281691f5d2658060bede7fd4eb8694725227c3309fe' 
  AND token = 'RB7iUwllpnaMu3xEGWeK0JGrioy1mfptWqRxNOjE7sw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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