Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd1740c3f0a817daac5606febb2367679f32cb415852e499eef029b916cac2703' 
  AND token = 'oJu27r3Nj9TYidDapvn8HfqmSIMVUCAdk2XbHbTYFVo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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