Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '245eb8db0c3d4e1b81c62f1130c4ce2cf21f9f3d42adc2d8dfb1072284537db5' 
  AND token = 'axUUNp2fAB00EkiNd70zRUr9BPQ7GceJy4vFyxTb/xA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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