Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83ba39f876a36a769e6665365bb3d6a77abbbe3e775b34c399e17d4eafe0bc8e' 
  AND token = 'O/qrCIQLn4IGJtxIQJbzt47g1uD2+DT7m6HJCM2I5tQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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