Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f984b97cf98aed6ee4426103e9118f947a17405742709236e950dc54c81ba90c' 
  AND token = 'QZFqwmdNjE1jU5U9FY/PImPM0fSA1hYDjdfIUu9V9jc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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