Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91ec8dc955257b74a904d65325afc38882a18ef4125ff34d9c932298e98c3130' 
  AND token = 'k5xfDXK6wuN4J7awW8RBwvwSrvAHzOCaiNwav1ZkDAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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