Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '871d9100365213b0e1ccd4e8fdb6b50d59c3ae3011796c31d82e30ba3a65050e' 
  AND token = 'QwAucpv0xoK2YdhYOxT/eZlGMruV3v78gL92LGGlAzI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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