Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65e34d309088b620bee1542b3163e13e6cbb371419acbedfeb427183753e34ea' 
  AND token = 'hwDlFLGZqBpkeIE6qkw0X63GcCwZjOFAEcSo9UmdIFA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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