Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1bc7fbe49273736f0c243bce58bafc56643dc48f967c59fff5caf5285e66dd96' 
  AND token = 'VjD+5+3ao9dbtRuqrEbBjI2uDj3pvM9I/AXJTGCjts0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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