Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ce4f3f8f6926bd08dd7f8cb0ba2affeeb694a11ef7da7988cd8132c9b7704175' 
  AND token = 'HifAS7dHR2zpikcRg5qdxappE9/eaVlkggaAgUqGdzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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