Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5927b7d6d73f676978d1702b002eb400445d2d35f848bc2b523821bd3f00676' 
  AND token = '2MlnXGulhhTy6rRczxSXSWQyGArtBeQAKOZJZNH7cFc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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