Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e9a4f0940096f7d31e49eec6186a42daad3ee81b534c6496def0c5409bdeb84' 
  AND token = 'p4tgtXYjxfSsrH9hjuDKACwafOnnyE2qvfXE51FYYBg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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