Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '655c84b55f04d691d9e5817b0cf72af56d5737c9116302a11c00d5f2704d0aa4' 
  AND token = 'SgEeKVRTv9kg4JlV9wmPeSZPJOpXQ0XEEO4MnUJop2E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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