Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1857ff45d4fe6c218274a1b190d0d88af2b52733fd38c7f8cac9b5ed02a8b03e' 
  AND token = '6JUcSl5pZt+rewaxIkzARhGW95GOgZtkwwdov6C1QIg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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