Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a4c9a91354b00e47ecb5981917c23492b1fa73b942316d5336a324226ec1608' 
  AND token = 'YOqub4wRCbW8vjuBGsqSnTlFu4lg5sQHK2bcQoTbf+Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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