Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '6f0b51f3ebadfe977076f0c318792d1175daf763a2ce752895f2460ec7138420' 
  AND token = 'j2IKq7PA6d/c4AIeWS3K3msWxO/eI7XIVuB3Se0dfmU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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