Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd4d94ddaf06fd3b8e161d5c39b9f2618a64b241e28dd71848cb6282aaa9834a' 
  AND token = 'W3ngC3Xa/8gvp0p5qAQ7DCpZWWvTu5XQ7mcc1Up1zIs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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