Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80d269364174d1df10813617c25fa66f5e75d654fdca18f0fd438796d97999e2' 
  AND token = '98k+NSEDdf3NwhktqF5aFdWj1qvNg7NODOaIbaDT9pk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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