Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae1a6c7563229d28c2e6783a2df847c6ed705026ce6af8592c51e99187e84f31' 
  AND token = '9Uoixrk3LiJE74ku0Gxqba0jr/tGfM9Tyufc0CqM91A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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