Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd7b4f1746ed39331ecd47cd412692084ac7cc79a156e8abf2806037edd662d7' 
  AND token = 'iVvcRrq8ps4mqhqdmxYF1gXHxkNg6OkqroWeTWDXXP8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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