Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8a1f86f57469c3e096523a8ad7fae899e6f437a96fb646d41d92b92776e0fea' 
  AND token = '+afxdzj3eOyCJeo9hjCHUfZw+DKBZrl5n8txzE5zJxQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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