Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '439b282afa0e0be7a2bee0703eca35f1c7317e1f97f905f728c9050afe91f72f' 
  AND token = '98Iy+1EgBlA25Nm6FYcWm0rymbK2RBdqfo8VpbZ7G0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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