Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc1db751a8c323aa3e5673b47cbe1b980646b5d34d922076eb8cec55c5d31578' 
  AND token = '1QjyoCq3Tvi1rafzY7fiIe6zMZ6M5+0ZavJo54PLeyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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