Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4a51ca3d0a40fef3f604f562177debd6a7ea33c58a218f86880f29b55e54cf1' 
  AND token = 'kf13fOjp6HunBb0bhP5kgZwikXCUHHzTFADlXIa3Db0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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