Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7d9e30f4d0fa3a9c6471b6a9c94581a11a551d190e405ec3fca94d75c6d6025' 
  AND token = 'nZkP5sVrT/W2C0XWhUrPvSWJIfsAf5ItE8VB3OeyQzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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