Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf568c2839ddd85f36201bd87d5e22080aae52e10ebf1063c5b3a9503ef17d79' 
  AND token = '0R75bY40gqVBkPfkXiFk6M2rcv9VwH4t3PXwPcgkW4Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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