Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11f57adc51767fa543eee0f52f5ffd24a6c8259ca6d7ecf008313aac3ef1c71d' 
  AND token = '0WkjNx29/ZlaWII52tGLyVClaOYSi0h2z1l6iyoqhGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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