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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '682795ad5861c607813c21f11e0251560e9f5f7eeac03f663dd3324fe39dea4f' 
  AND token = 'o14mawcmSTGF1MzwTi7h6w+NXkUsD5h7Z89nkh3l9F8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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