Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'afc0e9c9d02a28e93812ad6aa864bebc6ff62c2bf3e9cd0233564ab5d96c4301' 
  AND token = 'Xqglqo7dNkv8pujj4eMoLGhIj7KaRVpS2gh70CnI0Ws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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