Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a5cfb776a9430f85f89adc51a935fed985f2b37b072af7c2589d259d76ee262' 
  AND token = '1hZ8hR6aa0tUWm7iLJSiHVE7/SPed5JZ1cmoo5X2MxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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