Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '056505ddea01c5083be2751cc6c54dba246047b7e303b2d98757a35355fe2def' 
  AND token = 'n5+y6MJheTO25UMFWFuj8BKD0gk+ZHenjTfKzhvp7oU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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