Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85479051d28223e56c728c08bcbafa85ea1c2faa6bb81542d0c639cdfe34dc12' 
  AND token = 'xXtoQN9YBU5LlypLmHiVB6FC2n9RdqYxhR0XbADpVpY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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