Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f62eec7a6e1194d6f7df40a7211f4d92d42b598703b5b1eb930486b257aae554' 
  AND token = 'L9v9QPZnbGO1uW8QBD3R2iWg2FW2AGnSvUK02/xdNb0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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