Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cc509937619003b3a1319f130c2a7a5c7701224c3873c285d2052420501b665' 
  AND token = 'T+Q07KjWnztIOYNnIyVKaTEtyaq7NIhqRd89GnpvagM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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