Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1718daf7002774001d27f1857957270a06a086614987c19eea40a284afe5b5dd' 
  AND token = 'PXvJM754VR7KqewW3VOFAMrlkTHryVsUMsEB6uIZoJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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