Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96c01a7f61f7ed9394b5e9b8c4900783abc95a5f880d82c730e4c4a8570eb791' 
  AND token = 'iTxWVpBOmxssrCDxr9Xg8zrruHx8CuP91pYCdkgMqO0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}