Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '419f87aef2ce93b4e8fe649bc3ba0ff8f0908314935dccc1d1eb8b841eb578d1' 
  AND token = 'oSYDlgeBE7tq7gsOx8SRNm+TBMlzdS7LiVtvKKVHgpo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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