SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '403916b1090c18cfc328b878f4a192e12a5db01d3b5bed4cefe66cd250f53581' 
  AND token = 'Zx04j+SrxNc2uW/AnnhBG6R2Mk4F6zmwmkKqH0YwlII=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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