Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '938c31e5f196120b2ca4eb929f6a942efea19bf0d7ef1e177504195a7ab3c89e' 
  AND token = 'AmGkauLocQ+dM72WWEY0UdoXWFzw6KF8iCqpG02q8DY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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