Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'b321eb3b32384691748eb6d8d0f152fdc79c860af3fe8d0b49f88ebba5b865dc' 
  AND token = 'qh8QRTA3Hvs6A1DRjSPbqCH3AtZpicsNMsGnI0PTmi8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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