Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8edf4cf8deb2c5820c423f9834356c3ebe82bcb6577195703d87f105849fdce6' 
  AND token = '2XyysDZfy+/dkJZMR/XlF1A4nS7kv7cWnYb2wH3RCAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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