SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdeea61968f6f3497b229310c12566a7c175591fa81e09cf13955930ca4ca56b' 
  AND token = 'AY6zrYV+xgf9H2KWxRzZv0tURWws7y/jFLU/qC1rdr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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