Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a357d63a3b6660ba6c00f6020ce458b31343a671098cb250919be155d9c8a936' 
  AND token = 'ldyTuwU+ejiwwphNOehtn+8lFpQ/xrkYahqHIgJ5NU0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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