Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3e610fa1adbe5b4e00e1513c9c92593c25b126f3abf41f3fd1d3ca5a1e3a5332' 
  AND token = 'rkSapuv61XN0k41hMl1kbefzgGLKi0xJZz+h5ujYvvY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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