Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd614655cacb87155e69aed83eaab38073b494293fd01b5b9c61be4b35702f6fc' 
  AND token = 'YUkh/INoaMObzFoizSWtXIrmg0RwVYlHwyWmyLnofaE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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