Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4c586106aff899281ee37ef32747346e0f31574c6df3dd313057994c0bb90da' 
  AND token = '1Sg2loS0UC5pW514V+5YVSGjgS/nJYLWkojadQe3eNo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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