Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '90e11bfdd311c0ec0a6ca8ff08ed1f468023738ed915f3c2c7115f1916acc5b2' 
  AND token = 'j6IcQJGVlZr1AEyacDDrvP1v6wLyF0QSHY/80e7GL/g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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