Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89fcb7c76c181d604874d012468514ab6b103b14a512d6fbd5ab9f0f6905762c' 
  AND token = 'IFbjLbEcOlZOrHQhm1vp1d8sqGgnaO+b+j5yVd6CZM0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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