Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f87b259b894a07cf469f15851684f4d8d965304b2ef29a937ee7e02c55f1988d' 
  AND token = '4F9PMFEwRsVSdPmrumT7KsGfGN6bIj9aKAkk7xEW4Pk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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