Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '488c5ee101f88d8906ad7cc92a8e87a529018901a3f655dfafa3a16da99d61d6' 
  AND token = 'm2EbwOsCqovudWTW0K7+jh9U+12dTG8AsoGttWSnovk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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