Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4092eee9b10db469721af74630eaa56f841131650eaf69fef915d252f4cd04a9' 
  AND token = '0ly2nRF793+CnQysIiBuaeL0oEGvDNgh0Yq0oxH+Rb4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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