Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe9bffa723b684a8770651fd0e4238c2bd6949f2fe594c26d5275245b1aef132' 
  AND token = 'sIfi6WiaxMUnUQJN8l4t0ZSyL+CJfC8aZASIt2rShqI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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