Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abfff313322369e826648432546d6f31eb5efceff8238201eebbb47ff868c73f' 
  AND token = 'y/LawLbiOLKi3CHXpMR9gxGyfFPIdWSA16eaN6Zi6ig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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