Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47de5a93450f9ff3a8fc3231c61ba1f95bec3efdb74a4b39f22e4b3d18895af6' 
  AND token = 'zMxACfBoSnQe3afcXCuavP2WE2DIHWY+N8ctE/3PB0c=' 
  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"
    }
  }
}