Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a87d3dbe99e550346ef92047a37aa4495ec827f7a69fa533960fefd6b9d0779f' 
  AND token = 'Ca9un81IHRHI1WxIgeRLFGISXiW++3t2FmpNFJvG4AI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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