Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4f5d3969415941cf79a8db380694e90fa13456474f01f944cf07b0a0122022e' 
  AND token = '9w6EVXuFiRWRKcZaf529ZpXT4JhXyQPCC/FTGgY/850=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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