Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '861145fcd3a9c059d1d620b6a01de8437db29b8b6c1398ce9c9d29b9d69a9f69' 
  AND token = 'VVK1fFyH7oiZCiusKI8z/ECO7KQLNsSFZpsk4llZ2aE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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