Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69c80a48322c4b8caa151e87a0dd43b29854e45aed8ed0842590b8f2fa97b3ea' 
  AND token = 'IBBufFvlHdFnXJbPi4wj8FZZMuY8dkwjYB6MYc3RcXw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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