Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6422421c4e107b4a897016b542daf1988be15e638a02dc5cf70e13de5ef0cc95' 
  AND token = 'vYUswu6/wDqyiBmD72FuCbfzb0v6d73TI3LB63O4DPM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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