Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e46f44343ccc88cc265e0d0cee65aa7a04121c9060953e5f80c53a0f19e3d58' 
  AND token = 'BInzBbmP+uWdy+6NZcNSjn46jncpvQT5At2AhNCXK9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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