Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f8242772bbfc0420c23639763fcc9019bd1a41261b9de735a4b3a659af42c8a' 
  AND token = 'GpLT18i3OwbTd7G301/dLvS73g2xSW0a3rIYuHRZfSY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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