Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0a811b8872c1c0ab12404fe75f58ea511c1a4c3b4ba7101048f39d0472f8116' 
  AND token = 'zKvAdXoitDlOCmqGpXVWZXWqkFpffHGqtYjR3puLHGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}