Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b6f359ebd901fe6a95172f9fe1cf6641366cb418da7a3535272967af713447f6' 
  AND token = '+VnZA4sL+TCPHlRHSg4EyC1KvdySqD7vAfUH8Q3q/Wc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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