Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d0958ca7aeb2f4a589315ff7ed8c293647eb6633d9f150e3f0f3f63883e0cad' 
  AND token = 'EDsX8MRhccpHoU5sU16V8GCT4XAQ9Povb7vsh+jM0co=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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