Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a1a033fc36f2bd258afc9bcb27df899ef1cb190b8f3066ba40cf18c4495a0e9b' 
  AND token = '7xihltsrRevd/S8AZeSuYg0tg7GlFvzsG8ZeyOjj//g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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