Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f0e8ba5792d7344684b3a800daff9f1b501da0d9afd37271455045b45528b07' 
  AND token = 'XY0D4Z02WkmI0Uy77CftP//muxTk3InLWfmSKY8vUnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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