Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15698cbc7b578e7de220d54b2501c273bfd942ae5db9783d5d75ccce7096889f' 
  AND token = 'bO55VgBC/+VJFuE3/9AQugiNSxS0rxXEVoei2Un5wb0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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