Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77fe3dbd30c41a2f71a7720b683422d97127d3e78a53ef83e8a2b56cd018ed92' 
  AND token = '3YEKgGWjn866hpJ5jfPfa5iVulV5fu5zrGy7NGojaN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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