Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc3581b7e3fa2c635d1a2df1a57bff05c3aad9cd598d7cd5c31125fd17d4b66b' 
  AND token = 'VKO1WjF4sh3XaSdhccMAaT6grrlVamV25lAskS3RAsI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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