SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '607060e861c5a294f1762d1bfb57a09224c1859215a402b5f5cc63ef338d3129' 
  AND token = 'JY0Hau82vqvTGiVWZQa3ho90sXcLKWlgVgiLDdavjLg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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