Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '2fa27de108f027d73259c83b2f7dd50d67bdc38c1a2f1175f9bec2f5e9f711db' 
  AND token = 'yN5+BEPQ3ZZtGfJAbq8MFlUE/tGicaGaA6kz2sK0dcI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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