SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b2c8b3566c0838ecf0ff3f6f5baa4b9d6306ad77975e5bae72e22153b191ef32' 
  AND token = '0UZYCoeAIKJGmraqobhfMvZO10f+6paV7wT8c3jPoh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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