Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '942c2d1e6a4455155b34fc8532bd60a45a2c0afc833928b9fe0d1d0003d38cce' 
  AND token = 'aU9eMvQrXsvXuAtwpzTciUjok9FNL9XZvvVSmPvgC/g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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