Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3162901d8ba21e8f7f4d8adc909b6aa69097c8a84b833f2601cba845f5cc944' 
  AND token = 'fX9o+VxcGb3Z/E65rqTAN/hEZoy3Bi0H56EFu6380u4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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