Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33c3c0ce1a73fd9e18385e67e3a62402ff06f8e99e6a11bc9fe894edb67255dc' 
  AND token = 'kO70xIzc5rZM23bCEKsokK+pjE/5IXJvcOMBKnsOHRU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}