Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '010e74080b620fa3476ba8fcf4fb04b40b16d84b141c784a6eb0b93c1e4e09d3' 
  AND token = 'Y7tCXrIXLxWRJIMqTHoRVjoOCQTxoVzTrf+8F3FrwgE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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