Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18c4eede2fb6444950053fbc6f5b9de9b2add6cae44eec4edd90efaf22f643e1' 
  AND token = 'NSkms468/2LzUwHTJ9nneULcBUE8Le6S5JOoRpg/E/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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