SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41b0c2d192b42e773fda29f3b1d57fa79d9f5b4b7981ca9b56b8d1cf5470acbb' 
  AND token = 'is6QYpd+9MhfN5pU+CiFnquUNPAmV8px/Pyq8HHB9JQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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