SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '380e7f539d2200e51895ce2da80405c2fd7b4cca26c3d77ad12fbe756d2221d9' 
  AND token = 'axYQJmSlkZ2+cvfpKHvWORhRnlnJY2PlGwd4mKVRs6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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