SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '52495fb0d6186915bc21f7c78dc3c1294debffc51bf494fd80801593c36fe733' 
  AND token = 'PmbjsS/43wJ76VtVeFuwEX3GICyD3QEy3Rogs21xFH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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