Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba8d00d7928fe716a3ef61d70f4409e8d6dd5590bffc8ab56add904d58a6cbc4' 
  AND token = 'ORCMiQz28apLWpTz2i/hpbRmaoW7SACmFFdO9AAMp8k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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