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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'af55e26ca8bdc377f0d381f48a8d3b5228617ae9e7f2130863d83130757b0925' 
  AND token = 'QRZG338Kb13t80U7Te6pGNsXJApA26Wrj5XwQQMcek0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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