Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ff2e5bebf649c894515fc3d133630d4ecb8a77211b71094149525205d2f6554' 
  AND token = 'ciqOx3Y0bDXTKd0v8zQrV/MzlOzqhFlab1SC7EVrtxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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