Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7536346d0d82de7026e4d1215049f6be342a471047ef7e119415f2fb8e956d2c' 
  AND token = 'Zk6UOKxBYQIBujn33oPybhoYmGMi3iQ605cxO+HTS7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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