Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1033abdd7cfa3b801961c05fddbe9412a053659a80efda14e24dd3cd7e0a53c4' 
  AND token = 'vwV1mAbXOum618PE1EDFgLIIjH0PqWbrvx8n2YZ/5ug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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