Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '55b2f6a051f9bce4e1d07c0e706d8dcedb43a20bd715e43fbe31fe520a9bead0' 
  AND token = 'vwbsncLw7bU0guZKIZy3rUleJM5Gi9R/qWhB1f1DjkY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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