Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccc1b0e870159bfd8d9acecbc7d7d5dc6897b0c448b02a3edb3f5a2e1b6a2b78' 
  AND token = 'nUT1jzb2Fh/nuv5rDhIbU5oscz8z1ZWSlXXdUAjcMaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00361

JSON explain

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