Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '82c33b7ca72e8f851e5fb80c61584c7d116cfc80b7c5daf2bb6a42ad1b5d741c' 
  AND token = 'IoJ5cSkujkbmxAyHgRcYunJj32jlqsseg2BUN7iR3cI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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