Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8ccba29ddba4945b7cce2535a7ead6ce6689f57f17a6e65575926a1a8f3aa88' 
  AND token = '/7k2t8OaryBYDbId3UtYE1B9o6RdJYQAV62t/3tKfno=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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