Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '233fcff767cd8da12617b76ef6bca06737fef73300f036b14e3996b05b498f41' 
  AND token = '7vq24xjoRMIdHDlx379nhm6enbOLlMMdNRLzw5FZo7w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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