Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe83fa2e42ddf411ee68cdb3736cbf229f1590bab2ff8a4b3a087156b3b8a5ee' 
  AND token = '9UNsfUtp50WDm/WoTrs4pUml4opZiZH/GUf0orqqPVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}