SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4d99fd68dd3422e02e1b3aa27fa62db73d5d88fb47c0afcd6807542a42d20b07' 
  AND token = 'CjRmFcaKdnKxGlR+Qve9WKJonnP/QYWEnszIT6V9AQM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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