Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d3e6820c728ea7c580b94feca5689f89b4cbf7b94eb25bec59d5759bbccf5fe' 
  AND token = '3cbvMvAhfT1jTCcLQED0MKFUoS0WjkSmlLAWLS/1zSk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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