Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f605e5bfc574b4bc967c8fc170563273cffbffba1f4c715c52d58831e51a7764' 
  AND token = 'Yk4ozNnRC5K1iZDNyWsgDowmyixYO/ldbqeD3JeP044=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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