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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f970084c9619861c4ffe6907de996f87220e27b8ae69ec41ca4dbf1df050bc9d' 
  AND token = 'Bd056ncVfGbaAvimbcBMADlPmwGOdI92McLbyOrxdGw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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