Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8f1a6d8966b3ebda1be1d97b849ff231c36ce02128f992f5832ef58c504d2f5' 
  AND token = 'IV/gjeN7Qa4l0ZxaBRMDZhwf7X3k3hLheAgbkwe2E9o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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