Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36b63e8b6950b8e9e51f36f7e502adf770ad7c1f006079c33bdf8180b1f6e068' 
  AND token = 'WSKvkvfPXwuWeVAT0hn3lUG1/XuQakIOpFSOgaL8NDE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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