Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28a104b5bb0023b9a9f5394e00215999e50a1f66bfe88cbe24ac8dec0441d602' 
  AND token = '3s7FPjCv18z0vu8V4DIz2xayg04Fo91ZUAPG2wWpbeE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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