Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '012684c6600452625a47920e9c44566637aece589e4ed71a858234e6763ac9a8' 
  AND token = 'dhBz9rFIpkp6PZBbN48Ft7DTDnTvn9Eu/knVAvAn/4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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