Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec62d5bb2063b3502fb0b76ed156b04f20fcedecc2ef53ea69c8637463492252' 
  AND token = 'RgPahrZNJcXOfnv6mQy/B8Zaw9hvMA1nbuH86c27BdY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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