Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'edde5951e4aaf6269f10cd0238a7d9903d1a2a85a0d093dcf4703c6679b602ee' 
  AND token = 'b4oZRJbrCjkKdsFa4VgnSCxeEthukqA+KvK5ZkoYhx8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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