SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '89244fa291eea6a277cfa2e37a248a268c6479052b0063bf693b23ae12ec394a' 
  AND token = 'CVkR7eZB9U/qvaJFAxVxkh/XF0BxV0sOyQhywUA+X6Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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