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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f61136c40c8eb4f1ea4c53a8c0ae5da33f12060828f51cd73b821bb32f480ecd' 
  AND token = 'Tf37Syul8CGf4WMMyyfFMnmmgz3Rxf5sFhFtxRYpaf0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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