Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59f2404ef897d3bc1486ccfd7efb8aecfb7327b7e035cdb01bcbbda5d6b02da5' 
  AND token = 'YpTJvATBVLa2dXPNm7Sx/VDdQkTp8QbgN8FZ715ctUI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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