Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed60f01391b8d979603c7c45ef846be11474fb8f0b9a0c39cb350fd1a673f5db' 
  AND token = 'lUhYsqcMWPv96VLUtWhF83nmYuv0MYCnZA1WY3XwFRA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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