Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36bef6b9ce9cf646f8e9a56fffbd208d68654e105c3933ae8459722e11a65388' 
  AND token = 'k4Df7kQIEoLa8bv6pkI0eW046XWG4xxna5fDbLW2SsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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