Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9fb1213bc9d5f00e16fbb9a6e46456aed4686346eac2aacd1f65cf8fec004e9' 
  AND token = '4WXPSSSL+vBG5hA9MnMlPrW6hPczxUQWxv4LkJctQFQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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