Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f158ce3377f92125aa881ec1887c4a824f3cc10ce17f3eb151590921c73df44a' 
  AND token = '/zGUYPx8abw5u3GzvdrLkCnKSLwLC5TQdRNvYcQB5Xc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}