Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '91c1265be02a0e6d728c9d319e6dfce830b5b2077805991a6c0ee9793219223e' 
  AND token = 'O/JUCod9RkjlRo6LGfVIKkJpC2tj7Vlj5ANkpWNTHB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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