Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '50ad6829bec9f93f2ef8f53885183375d05e29ac9bd91e2a86406953b1249d0b' 
  AND token = 'XBR8tuUKszO0sdAL1Imq5JnnXVz+T+aaxIL4nDsd3BU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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