Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd06ebf626237863b704242a621a81de4bf991dde7998ae8bdb99ac70f1e9417' 
  AND token = 'E9BWHn91RgiD9ci7pzRvph4hgnDvGNwI3hneD/6/wSY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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