Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '804b4e4ec39df367e5ee41ede93e1d2349eb5b7982977dafc07c2b873f15a7d1' 
  AND token = '5t4FuiI8ojsRBDzZSujxGQeP8Dc4Q2YdpsgarOVtD6Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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