Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b1cab86e022515101c59c34facd285555b5f04fbb0c78930cf355d9a36e9fc6' 
  AND token = 'Ijn3IQaErU+isT041esscQZYa2iNtJ6JX0NVJ+OXJJI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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