Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40d1a34a3f7ccbaab7c2c2ffbb7c4569de9f211f4af4bbfe28bcf1b752143fef' 
  AND token = 'veTad0qQLoQsVSCduxk3nWjuGmRj373hLAyqFZins0A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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