SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '30efa5d7f6b819e38a0107b6b9877a7b449d2850e72143bbb3319c5674600cff' 
  AND token = 'FJqUodnPNQsWVysQ0KXgI/aQ5hA8erDz4zqmLQ8sJ/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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