Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c58e800d07f598a550fc434e974cce25c4b29e33e661991b763073579b65e536' 
  AND token = 'C0TgrrhRHZxXzya1XUkAtXTm/H7No1dGATemC4Z+XDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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