Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afba46c82b80f5bbf14413114295ef21baa0b0530049a660c779d10537be5984' 
  AND token = 'iMXcaIC8eXRyCeZ5JLL0MhIHMxOQOZhY/3yfr7W0G+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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