Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df8591b9a5d454031b547668365b074e3353fb874be14c6919450215f4ceb918' 
  AND token = 'KTeDYE6LSzaCCVeeh1MdYEV+57SE6Ko+qBpvjGeT7FY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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