Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '093844466effc9ba7765a3cc49238e26138795a38e1f145b6c851213ebea819d' 
  AND token = 'WCM5xzK0Wfitt8ceNFTJt8tltgFDOP1AB4H9DHfwe1k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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