Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f922a4608dfc5279774aad5830065430b624b2740b969c8b121b9c9d181765bb' 
  AND token = 'wQ7Kc7qwWmq0ZsjKW5WUn6ud7jKfSR2kFgXo/5gK8Rc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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