Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4ae0907705a130f26ae181a10b2eb9e0f0338a5964b2299c612a35602530680' 
  AND token = 'Qnf7IOgftuJV8JcTM+B4lVU+xbIIfmQTEpiTrKgMHDE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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