Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '944408ff29d35401d89e49196bf1e62e09de15c6afc6c97aec5cf216717bf3c5' 
  AND token = 'DLyqhi/j5O/fqTGlzjT7tSydo8dAG5AoL6D+2h+XBro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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