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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d0807a7fe8787e557db357d186a88ca99d030e678352144d280f2f36a3b18f3' 
  AND token = '2uueFU+f3xB9nNjl8YB97p3lLv0hF18nFBiZR8DlBlY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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