Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7de4e3b27b789c26c7908ceb5336a7fd1503ae7afcf13dbf3e01d3aa622bf1bf' 
  AND token = 'UJ9x6TI5KZ7RGRJsx3OSlbldpI7IUDTGpoTkwvphsYc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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