SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '23d732fb1e515ddc43f0bcfc377d41162d9199277bfc4ca4c9d4d2fea5cbed1a' 
  AND token = 'w0ouphOqVfomJ4+ZHz8813jHL5qo0rmygWF5XqemD8o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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