Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2b6243add2ae24ce1049dee3b6802eabe856c264fde69b203422a6d17e60f5a' 
  AND token = '3XKWJHz04BUmjwWvXGUo3i4p3okPfSlAVsy0fqcw+0c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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