Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0939d1683a42913a7b9477ae0184af03d026ab623f0540ed1516dc3272c9b55d' 
  AND token = 'c/6rxTSvn/0axdBBylQvP1xjolBX8s3du8I9uZsGuI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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