Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e274e4a68eb6565c458ddb2f6f68811e1d8c3c4174c142c0bc6f5b38e5e65c24' 
  AND token = 'V4SpYzbQxh3/2Gr2uOpdSlGH43bg2lUJIENAqrcBAWk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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