Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf41522c9eb2dc79d90768e3c5f4f5844807d8c2d48f0447881c9c55eeee9d5b' 
  AND token = 'K6lVKTlATCtgSIf6V1Xmh+Q6JU0VEPnPoHJG4z4KcE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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